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Food is any substance consumed to provide
nutritional Nutrition is the biochemical Biochemistry or biological chemistry, is the study of chemical processes within and relating to living organism In biology, an organism (from Ancient Greek, Greek: ὀργανισμός, ''organismos'') is ...
support for an
organism In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interactions, Physiology, physiological me ...

organism
. Food is usually of
plant Plants are predominantly photosynthetic Photosynthesis is a process used by plants and other organisms to Energy transformation, convert light energy into chemical energy that, through cellular respiration, can later be released to fuel ...

plant
,
animal Animals (also called Metazoa) are multicellular A multicellular organism is an organism In biology, an organism () is any organic, life, living system that functions as an individual entity. All organisms are composed of cells ...

animal
or
fungal A fungus (plural The plural (sometimes list of glossing abbreviations, abbreviated ), in many languages, is one of the values of the grammatical number, grammatical category of number. The plural of a noun typically denotes a quantity great ...

fungal
origin, and contains essential
nutrient A nutrient is a substance Substance may refer to: * Substance (Jainism), a term in Jain ontology to denote the base or owner of attributes * Chemical substance, a material with a definite chemical composition * Matter, anything that has mass and t ...
s, such as
carbohydrate A carbohydrate () is a biomolecule , showing alpha helices, represented by ribbons. This poten was the first to have its suckture solved by X-ray crystallography by Max Perutz and Sir John Cowdery Kendrew in 1958, for which they received a ...
s,
fat In nutrition Nutrition is the biochemical Biochemistry or biological chemistry, is the study of chemical processes within and relating to living organisms. A sub-discipline of both chemistry and biology, biochemistry may be divided ...

fat
s,
proteins Proteins are large biomolecule , showing alpha helices, represented by ribbons. This poten was the first to have its suckture solved by X-ray crystallography by Max Perutz and Sir John Cowdery Kendrew in 1958, for which they received a No ...
,
vitamin A vitamin is an organic molecule , CH4; is among the simplest organic compounds. In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen chemical bond, bonds. Due to carbon's ability to Catenation, ...
s, or
minerals In geology Geology (from the Ancient Greek γῆ, ''gē'' ("earth") and -λoγία, ''-logia'', ("study of", "discourse")) is an Earth science concerned with the solid Earth, the rock (geology), rocks of which it is composed, and the proces ...
. The substance is
ingested Ingestion is the consumption of a substance by an organism In biology, an organism (from Ancient Greek, Greek: ὀργανισμός, ''organismos'') is any individual contiguous system that embodies the Life#Biology, properties of life. I ...
by an
organism In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interactions, Physiology, physiological me ...

organism
and assimilated by the organism's
cells Cell most often refers to: * Cell (biology), the functional basic unit of life Cell may also refer to: Closed spaces * Monastic cell, a small room, hut, or cave in which a monk or religious recluse lives * Prison cell, a room used to hold peopl ...
to provide
energy In physics Physics is the that studies , its , its and behavior through , and the related entities of and . "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regula ...

energy
, maintain life, or stimulate growth. Different species of animals have different
feeding behaviours Feeding is the process by which organisms, typically animals, obtain food. Terminology often uses either the suffixes -vore, -vory, or -vorous from Latin ''vorare'', meaning "to devour", or -phage, -phagy, or -phagous from Greek φαγε ...
that satisfy the needs of their unique
metabolism Metabolism (, from el, μεταβολή ''metabolē'', "change") is the set of life Life is a characteristic that distinguishes physical entities A bubble of exhaled gas in water In common usage and classical mechanics, a phys ...

metabolism
s, often evolved to fill a specific
ecological niche In ecology Ecology (from el, οἶκος, "house" and el, -λογία, label=none, "study of") is the study of the relationships between living organisms, including humans, and their physical environment. Ecology considers organisms ...

ecological niche
within specific geographical contexts.
Omnivorous An omnivore () is an animal Animals (also called Metazoa) are multicellular eukaryotic organisms that form the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular ...
humans are highly adaptable and have adapted to obtain food in many different ecosystems. Historically,
human Humans (''Homo sapiens'') are the most abundant and widespread species In biology, a species is the basic unit of biological classification, classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A speci ...

human
s secured food through two main methods:
hunting and gathering A hunter-gatherer is a human living in a society in which most or all food is obtained by foraging (collecting wild plants and pursuing Wildlife, wild animals). Hunter-gatherer societies stand in contrast to agriculture, agricultural societies, wh ...
and
agriculture Agriculture is the science, art and practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary Image:Family watching television 1958.jpg, Exercise trends, Increases in sedentary behaviors su ...

agriculture
. As agricultural technologies increased, humans settled into
agriculture lifestyles Agriculture is the science, art and practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentism, sedentary human civilization, whereby farming of domestication, domesticated species created food ...
with diets shaped by the agriculture opportunities in their geography. Geographic and cultural differences has led to creation of numerous
cuisine A cuisine is a style of cooking characterized by distinctive ingredients, List of cooking techniques, techniques and dish (food), dishes, and usually associated with a specific culture or geographic region. Regional food preparation traditions ...

cuisine
s and
culinary arts Culinary arts, in which ''culinary Culinary arts, in which ''culinary Culinary arts, in which '' culinary'' means "related to cooking Cooking or cookery is the art, science, and craft of using heat to Outline of food preparation, prepare ...
, including a wide array of
ingredient An ingredient is a substance that forms part of a mixture In chemistry Chemistry is the science, scientific study of the properties and behavior of matter. It is a natural science that covers the Chemical element, elements that make up m ...
s,
herbs In general use, herbs are a widely distributed and widespread group of plants, excluding vegetables Vegetables are parts of plants that are consumed by humans or other animals as food. The original meaning is still commonly used and is appl ...
,
spice A spice is a seed A seed is an embryonic ''Embryonic'' is the twelfth studio album by experimental rock band the Flaming Lips released on October 13, 2009, on Warner Bros. Records, Warner Bros. The band's first double album, it was releas ...

spice
s,
techniques Technique or techniques may refer to: Music * The Techniques, a Jamaican rocksteady vocal group of the 1960s *Technique (band), a British female synth pop band in the 1990s *Technique (album), ''Technique'' (album), by New Order, 1989 *Techniques ( ...
, and
dishes Dish, dishes or DISH may refer to: Culinary * Dish (food), something prepared to be eaten * Dishware, plates and bowls for eating, cutting boards, silverware Communications * Dish antenna a type of antenna * Dish Network, a satellite television ...
. As cultures have mixed through forces like
international trade International trade is the exchange of capital Capital most commonly refers to: * Capital letter Letter case (or just case) is the distinction between the letters that are in larger uppercase or capitals (or more formally ''majuscul ...
and
globalization Globalization, or globalisation (Commonwealth English The use of the English language English is a West Germanic languages, West Germanic language first spoken in History of Anglo-Saxon England, early medieval England, which ha ...

globalization
, ingredients have become more widely available beyond their geographic and cultural origins, creating a cosmopolitan exchange of different food traditions and practices. Today, the majority of the
food energy Food energy is chemical energy Chemical energy is the energy of chemical substance A chemical substance is a form of matter In classical physics and general chemistry, matter is any substance that has mass and takes up space by havin ...
required by the ever-
increasing Image:Monotonicity example3.png, Figure 3. A function that is not monotonic In mathematics, a monotonic function (or monotone function) is a function (mathematics), function between List of order structures in mathematics, ordered sets that pres ...
population of the world
population of the world
is supplied by the industrial
food industry The food industry is a complex, global network of diverse businesses that supplies most of the food consumed by the World population, world's population. The term food industries covers a series of industrial activities directed at the producti ...
, which produces food with
intensive agriculture Intensive agriculture, also known as intensive farming (as opposed to extensive farming Extensive farming or extensive agriculture (as opposed to intensive farming) is an agricultural Agriculture is the science, art and practice of cultiv ...
and distributes it through complex
food processing Food processing is the transformation of agricultural products into food Food is any substance consumed to provide nutritional Nutrition is the biochemical Biochemistry or biological chemistry, is the study of chemical processes with ...
and
food distribution Food distribution is the process where a general population is supplied with food. The Food and Agriculture Organization The Food and Agriculture Organization of the United Nations (FAO)french: Organisation des Nations unies pour l'alimentatio ...

food distribution
systems. This system of conventional agriculture relies heavily on
fossil fuel A fossil fuel is a hydrocarbon In , a hydrocarbon is an consisting entirely of and . Hydrocarbons are examples of s. Hydrocarbons are generally colourless and hydrophobic with only weak odours. Because of their diverse molecular structure ...
s, which means that the food and agricultural system is one of the
major contributors to climate change Major is a military rank of commissioned officer status, with corresponding ranks existing in many military forces throughout the world. Background When used unhyphenated, in conjunction with no other indicators, major is one rank senior to ...
, accountable for as much as 37% of total
greenhouse gas emissions Greenhouse gas emissions from human activities strengthen the greenhouse effect The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without ...
. Addressing the
carbon intensity An emission intensity (also carbon intensity, C.I.) is the emission rate of a given pollutant A pollutant is a substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource. A po ...
of the
food systemThe term food system is used frequently in discussions about nutrition, food, health, community, economic development and agriculture Agriculture is the science, art and practice of cultivating plants and livestock. Agriculture was the key ...
and
food waste Food waste or food loss is food that is not eaten. The causes of food waste or loss are numerous and occur throughout the food system, during food production, production, food processing, processing, Food distribution, distribution, Grocery store, ...

food waste
are
important mitigation measures Importance or Important may refer to: * Notability, being worthy of notice, having fame, or being considered to be of a high degree of interest, significance, or distinction * Social status, the measurement of importance within society * Value (et ...
in the global response to climate change. The food system has significant impacts on a wide range of other social and political issues including:
sustainability Sustainability is the capacity to endure in a relatively ongoing way across various domains of life. In the 21st century, it refers generally to the capacity for Earth's biosphere and human civilization to co-exist. For many, sustainability is ...

sustainability
,
biological diversity Biodiversity is the biological variety and variability of life on Earth. Biodiversity is a measure of variation at the genetic, species In biology, a species is the basic unit of biological classification, classification and a taxonomic ...
,
economics Economics () is a social science that studies the Production (economics), production, distribution (economics), distribution, and Consumption (economics), consumption of goods and services. Economics focuses on the behaviour and interact ...
,
population growth Population growth is the increase in the number of people in a population Population typically refers the number of people in a single area whether it be a city or town, region, country, or the world. Governments typically quantify the size ...
,
water supply Water supply is the provision of water Water (chemical formula H2O) is an , transparent, tasteless, odorless, and , which is the main constituent of 's and the s of all known living organisms (in which it acts as a ). It is vital for ...
, and access to food. The
right to food The right to food, and its variations, is a human right protecting the right of people to feed themselves in dignity, implying that sufficient food is available, that people have the means to access it, and that it adequately meets the individual' ...
is a
human right Human rights are Morality, moral principles or Norm (social), normsJames Nickel, with assistance from Thomas Pogge, M.B.E. Smith, and Leif Wenar, 13 December 2013, Stanford Encyclopedia of PhilosophyHuman Rights Retrieved 14 August 2014 for c ...
derived from the
International Covenant on Economic, Social and Cultural Rights The International Covenant on Economic, Social and Cultural Rights (ICESCR) is a multilateral treaty A treaty is a formal legally binding written agreement between actors in international law. It is usually entered into by sovereign states ...
(
ICESCR The International Covenant on Economic, Social and Cultural Rights (ICESCR) is a multilateral treaty A treaty is a formal, legally binding written agreement between actors in international law International law, also known as public inte ...

ICESCR
), recognizing the "right to an adequate standard of living, including adequate food", as well as the "
fundamental right Fundamental rights are a group of rights that have been recognized by a high degree of protection from encroachment. These rights are specifically identified in a Constitution A constitution is an aggregate of fundamental principles or establ ...
to be free from
hunger In politics, humanitarian aid, and the social sciences, hunger is defined as a condition in which a person cannot eat sufficient food to meet basic nutritional needs for a sustained period. In the field of hunger relief, the term ''hunger'' ...

hunger
". Because of these fundamental rights,
food security Food security is the measure of the availability of food and individuals' Economic inequality, ability to access it. According to the United Nations' Committee on World Food Security, food security is defined as meaning that all people, at all ti ...
is often a priority international policy activity; for example
Sustainable Development Goal 2 Sustainable Development Goal 2 (SDG 2 or Global Goal 2) aims to achieve "zero hunger". It is one of the 17 Sustainable Development Goals established by the United Nations in 2015. The official wording is: "End hunger, achieve food security and im ...

Sustainable Development Goal 2
"Zero hunger" is meant to eliminate
hunger In politics, humanitarian aid, and the social sciences, hunger is defined as a condition in which a person cannot eat sufficient food to meet basic nutritional needs for a sustained period. In the field of hunger relief, the term ''hunger'' ...

hunger
by 2030.
Food safety Food safety (or food hygiene) is used as a scientific method/discipline describing handling, food processing, preparation, and food storage, storage of food in ways that prevent foodborne illness, food-borne illness. The occurrence of two or ...
and
food security Food security is the measure of the availability of food and individuals' Economic inequality, ability to access it. According to the United Nations' Committee on World Food Security, food security is defined as meaning that all people, at all ti ...
are monitored by international agencies like the
International Association for Food Protection The International Association for Food Protection (IAFP), founded in 1911, is a non-profit association of food safety professionals based in Des Moines, Iowa. The organization claims a membership of over 3,000 members from 50 nations. The mission ...
,
World Resources Institute The World Resources Institute (WRI) is a global research non-profit organization established in 1982 with funding from the MacArthur Foundation The John D. and Catherine T. MacArthur Foundation is a private foundation A private foundation i ...
,
World Food Programme The World Food Programme; it, Programma alimentare mondiale; es, Programa Mundial de Alimentos; ar, برنامج الأغذية العالمي, translit=barnamaj al'aghdhiat alealami; russian: Всемирная продовольственн ...

World Food Programme
,
Food and Agriculture Organization The Food and Agriculture Organization of the United Nations (FAO)french: Organisation des Nations unies pour l'alimentation et l'agriculture; it, Organizzazione delle Nazioni Unite per l'Alimentazione e l'Agricoltura is a list of specialized ...
, and
International Food Information Council Founded in 1985, the International Food Information Council (IFIC) is a nonprofit organization A nonprofit organization (NPO), also known as a non-business entity, not-for-profit organization, or nonprofit institution, is a legal entity organiz ...
, and are often subject to national regulation by institutions, like the
Food and Drug Administration The United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country Continental United States, primarily located in North America. It consists of 50 U.S. state, st ...
in the United States.


Definition and classification

Food is any substance consumed to provide
nutritional Nutrition is the biochemical Biochemistry or biological chemistry, is the study of chemical processes within and relating to living organism In biology, an organism (from Ancient Greek, Greek: ὀργανισμός, ''organismos'') is ...
support for an
organism In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interactions, Physiology, physiological me ...

organism
. It can be raw, processed or formulated and is consumed orally by animals for growth, health or pleasure. Food is mainly composed of water,
lipids In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interactions, Physiology, physiological mechanis ...
,
proteins Proteins are large biomolecule , showing alpha helices, represented by ribbons. This poten was the first to have its suckture solved by X-ray crystallography by Max Perutz and Sir John Cowdery Kendrew in 1958, for which they received a No ...

proteins
and
carbohydrates is a disaccharide A disaccharide (also called a double sugar or ''biose'') is the sugar Sugar is the generic name for sweet-tasting, soluble carbohydrate is a disaccharide found in animal milk. It consists of a molecule of D-galacto ...
.
Minerals In geology Geology (from the Ancient Greek γῆ, ''gē'' ("earth") and -λoγία, ''-logia'', ("study of", "discourse")) is an Earth science concerned with the solid Earth, the rock (geology), rocks of which it is composed, and the proces ...

Minerals
(e.g salts) and organic substances (e.g
vitamins A vitamin is an organic molecule (or a set of molecules closely related chemically, i.e. vitamers) that is an essential micronutrient which an organism In biology, an organism (from Ancient Greek, Greek: ὀργανισμός, ''org ...
) can also be found in food. Plants,
algae Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic Photosynthesis is a process used by plants and other organisms to convert Conversion or convert may refer to: Arts, entertainment, and media * Co ...

algae
and some microorganisms use
photosynthesis Photosynthesis is a process used by plants and other organisms to into that, through , can later be released to fuel the organism's activities. Some of this chemical energy is stored in molecules, such as s and es, which are synthesized fro ...

photosynthesis
to make their own food molecules. Water is found in many foods and has been defined as a food by itself. Food provides energy and nutrition to the organism. Water and
fiber Fiber or fibre (from la, fibra, links=no) is a natural Nature, in the broadest sense, is the natural, physical, material world or universe The universe ( la, universus) is all of space and time and their contents, including ...

fiber
have low energy densities, or
calories The calorie is a unit of energy defined as the amount of heat needed to raise the temperature of a quantity of water by one degree. For historical reasons, two main definitions of calorie are in wide use. The small calorie or gram calorie (usual ...
, while fat is the most energy dense component. Human food can be classified in various ways, either by related content or by how the food is processed. The number and composition of food groups can vary. Most systems include four basic groups that describe their origin and relative nutritional function: Vegetables and Fruit, Cereals and Bread, Dairy, and Meat. Studies that look into diet quality often group food into whole grains/cereals, refined grains/cereals, vegetables, fruits, nuts, legumes, eggs, dairy products, fish, red meat, processed meat, and sugar-sweetened beverages. The
Food and Agriculture Organization The Food and Agriculture Organization of the United Nations (FAO)french: Organisation des Nations unies pour l'alimentation et l'agriculture; it, Organizzazione delle Nazioni Unite per l'Alimentazione e l'Agricoltura is a list of specialized ...
and
World Health Organization The World Health Organization (WHO) is a specialized agency of the United Nations United Nations Specialized Agencies are autonomous organizations working with the United Nations and each other through the co-ordinating machinery of the Unit ...
use a system with nineteen food classifications: cereals, roots, pulses and nuts, milk, eggs, fish and shellfish, meat, insects, vegetables, fruits, fats and oils, sweets and sugars, spices and condiments, beverages, foods for nutritional uses, food additives, composite dishes and savoury snacks.


Food sources

In a given ecosystem, food forms a
web Web most often refers to: * Spider web A spider web, spiderweb, spider's web, or cobweb (from the archaic word '' coppe'', meaning "spider") is a structure created by a spider Spiders ( order Araneae) are air-breathing arthropod An ar ...

web
of interlocking
chains A chain is a assembly of connected pieces, called links, typically made of metal, with an overall character similar to that of a in that it is flexible and d in but , rigid, and load-bearing in . A chain may consist of two or more links. C ...

chains
with
primary producers An autotroph or primary producer is an organism that produces complex organic compounds (such as carbohydrates, fats, and proteins) using carbon from simple substances such as carbon dioxide,Morris, J. et al. (2019). "Biology: How Life Works", 3r ...
at the bottom and
apex predators File:Comparison of size of orca and great white shark.svg, The great white shark (bottom) was originally considered the apex predator of the ocean; however, the killer whale (top) has proven to be a predator of the shark. An apex predator, also ...
at the top. Other aspects of the web include detrovores (that eat
detritis
detritis
) and
decomposers Decomposers are organisms that break down dead or decaying organisms, they carry out decomposition, a process possible by only certain kingdoms, such as fungi. Like herbivores and predator Predation is a biological interaction where one o ...
(that break down dead organisms). Primary producers include algae, plants, bacteria and protists that acquire their energy from sunlight. Primary consumers are the herbivores that consume the pants and secondary consumers are the carnivores that consume those herbivores. Some organisms, including most mammals and birds, diets consist of both animals and plants and they are considered omnivores. The chain ends in the apex predator, the animal that has no known predators in its ecosystem. Humans are often considered apex predators. Humans are omnivores finding sustenance in vegetables, fruits, cooked meat, milk, eggs, mushrooms and seaweed.
Cereal A cereal is any Poaceae, grass cultivated (grown) for the edible components of its grain (botanically, a type of fruit called a caryopsis), composed of the endosperm, cereal germ, germ, and bran. The term may also refer to the resulting grain ...

Cereal
grain is a
staple food A staple food, food staple, or simply a staple, is a food Food is any substance consumed to provide Nutrient, nutritional support for an organism. Food is usually of plant, animal or Fungus, fungal origin, and contains essential nutrients, ...

staple food
that provides more food energy worldwide than any other type of crop. ,
wheat Wheat is a grass widely cultivated for its seed, a cereal grain which is a worldwide staple food. The many species of wheat together make up the genus ''Triticum''; the most widely grown is common wheat Common wheat (''Triticum aestivum'' ...

wheat
, and
rice Rice is the seed A seed is an embryonic ''Embryonic'' is the twelfth studio album by experimental rock band the Flaming Lips released on October 13, 2009, on Warner Bros. Records, Warner Bros. The band's first double album, it was relea ...

rice
account for 87% of all grain production worldwide. Most of the grain that is produced worldwide is fed to livestock. We also use fungi and ambient
bacteria Bacteria (; common noun bacteria, singular bacterium) are ubiquitous, mostly free-living organisms often consisting of one Cell (biology), biological cell. They constitute a large domain (biology), domain of prokaryotic microorganisms. Typ ...

bacteria
in the preparation of
fermented Fermentation is a metabolic Metabolism (, from el, μεταβολή ''metabolē'', "change") is the set of life Life is a characteristic that distinguishes physical entities that have biological processes, such as signaling ...
and
pickled Pickling is the process of preserving or extending the shelf life of food Food is any substance consumed to provide Nutrient, nutritional support for an organism. Food is usually of plant, animal or Fungus, fungal origin, and contains essen ...
foods like
leavened Bread is a staple food prepared from a dough of flour and water, usually by baking. Throughout recorded history, it has been a prominent food in large parts of the world. It is one of the oldest man-made foods, having been of significant import ...
bread Bread is a staple food prepared from a dough of flour and water, usually by baking. Throughout recorded history, it has been a prominent food in large parts of the world. It is one of the oldest man-made foods, having been of significant impor ...

bread
,
alcoholic drinks An alcoholic drink is a drink A drink (or beverage) is a liquid A liquid is a nearly incompressible fluid In physics, a fluid is a substance that continually Deformation (mechanics), deforms (flows) under an applied shear stress, o ...
,
cheese Cheese is a dairy product Dairy products or milk products are a type of food Food is any substance consumed to provide Nutrient, nutritional support for an organism. Food is usually of plant, animal or Fungus, fungal origin, and contai ...

cheese
,
pickles Pickles may refer to: Food * Pickles, a name for a pickled cucumber in the United States and Canada * Pickle, a sweet, vinegary pickled chutney popular in Britain, such as Branston (brand), Branston Pickle, also known as "sweet pickle" or "plou ...

pickles
,
kombucha Kombucha (also tea mushroom, tea fungus, or Manchurian mushroom when referring to the culture Culture () is an umbrella term which encompasses the social behavior and Norm (social), norms found in human Society, societies, as well as the kno ...

kombucha
, and
yogurt Yogurt (; , from tr, yoğurt) also spelled yoghurt, yogourt or yoghourt, is a food produced by bacteria Bacteria (; common noun bacteria, singular bacterium) are a type of biological cell The cell (from Latin ''cella'', meaning ...

yogurt
. Another example is
blue-green algae Cyanobacteria , also known as Cyanophyta, are a phylum In biology, a phylum (; plural The plural (sometimes list of glossing abbreviations, abbreviated ), in many languages, is one of the values of the grammatical number, grammatical ca ...
such as Spirulina. Inorganic substances such as
salt Salt is a mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure fo ...

salt
,
baking soda Sodium bicarbonate (IUPAC name: sodium hydrogencarbonate), commonly known as baking soda or bicarbonate of soda, is a chemical compound with the formula NaHCO3. It is a salt (chemistry), salt composed of a sodium cation (Sodium, Na+) and a bica ...

baking soda
and
cream of tartar Potassium bitartrate, also known as potassium hydrogen tartrate, with formula K C4H5O6, is a byproduct of winemaking Winemaking or vinification is the production of wine, starting with the selection of the fruit, its Ethanol fermentation, ferme ...
are used to preserve or chemically alter an ingredient.


Plants

Many plants and plant parts are eaten as food and around 2,000 plant species are cultivated for food. Many of these plant species have several distinct
cultivar A cultivar is a type of plant that people have bred for desired traits, which are reproduced in each new generation by a method such as grafting, tissue culture or carefully controlled seed production. Most cultivars arise from purposeful human ...
s.
Seed A seed is an embryonic ''Embryonic'' is the twelfth studio album by experimental rock band the Flaming Lips released on October 13, 2009, on Warner Bros. Records, Warner Bros. The band's first double album, it was released to generally positi ...

Seed
s of plants are a good source of food for animals, including humans, because they contain the nutrients necessary for the plant's initial growth, including many healthful fats, such as omega fats. In fact, the majority of food consumed by human beings are seed-based foods. Edible seeds include cereals (
corn Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn (North American English, North American and Australian English), is a cereal grain first domesticated by indigenous peoples of the Americas, indige ...

corn
,
wheat Wheat is a grass widely cultivated for its seed, a cereal grain which is a worldwide staple food. The many species of wheat together make up the genus ''Triticum''; the most widely grown is common wheat Common wheat (''Triticum aestivum'' ...

wheat
,
rice Rice is the seed A seed is an embryonic ''Embryonic'' is the twelfth studio album by experimental rock band the Flaming Lips released on October 13, 2009, on Warner Bros. Records, Warner Bros. The band's first double album, it was relea ...

rice
,
et cetera ''Et Cetera'' (, ), abbreviated to ''etc.'', ''etc'', ''et cet.'', ''&c.'' or ''&c'' is a Latin Latin (, or , ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoke ...

et cetera
),
legume A legume () is a plant Plants are predominantly photosynthetic Photosynthesis is a process used by plants and other organisms to Energy transformation, convert light energy into chemical energy that, through cellular respiration, can ...

legume
s (
bean A bean is the seed of one of several of the , which are used as vegetables for human or animal food. They can be cooked in many different ways, including boiling, frying, and baking, and are used in many traditional dishes throughout th ...

bean
s,
pea The pea is most commonly the small spherical seed A seed is an embryonic plant enclosed in a protective outer covering. The formation of the seed is part of the process of reproduction Reproduction (or procreation or breeding) is ...

pea
s,
lentil The lentil (''Lens culinaris'' or ''Lens esculenta'') is an edible legume A legume () is a plant in the family Fabaceae (or Leguminosae), or the fruit or seed of such a plant. When used as a dry grain, the seed is also called a pulse. Legumes ...
s, et cetera), and
nuts Nut often refers to: * Nut (fruit) A nut is a fruit composed of an inedible hard shell and a seed, which is generally edible. In general usage and in a Culinary nut, culinary sense, a wide variety of dried seeds are called nuts, but in a botan ...
.
Oilseed Vegetable oils, or vegetable fats, are oil An oil is any nonpolar chemical substance A chemical substance is a form of matter In classical physics and general chemistry, matter is any substance that has mass and takes up space by ...
s are often pressed to produce rich oils -
sunflower ''Helianthus'' () is a genus Genus /ˈdʒiː.nəs/ (plural genera /ˈdʒen.ər.ə/) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, vi ...

sunflower
,
flaxseed Flax, also known as common flax or linseed, is a flowering plant Flowering plants include multiple members of the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek#REDIRECT Greek Greek may ...
,
rapeseed Rapeseed (''Brassica napus ''subsp.'' napus''), also known as rape, or oilseed rape, is a bright-yellow flowering member of the family Brassicaceae Brassicaceae () or Cruciferae () is a medium-sized and economically important family ...

rapeseed
(including
canola oil Canola oil is a vegetable oil Vegetable oils, or vegetable fats, are oil An oil is any nonpolar chemical substance A chemical substance is a form of matter In classical physics and general chemistry, matter is any substanc ...
),
sesame Sesame ( or ; ''Sesamum indicum'') is a flowering plant Flowering plants include multiple members of the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek Greek may refer to: Greece Anythi ...

sesame
, etc.McGee, Chapter 9. Seeds are typically high in
unsaturated fat In nutrition Nutrition is the biochemical and physiological process by which an organism In biology, an organism (from Ancient Greek, Greek: ὀργανισμός, ''organismos'') is any individual contiguous system that embodies ...
s and, in moderation, are considered a
health food A healthy diet is a diet Diet may refer to: Food * Diet (nutrition) In nutrition, diet is the sum of food consumed by a person or other organism. The word diet often implies the use of specific intake of nutrition for #Health, health or #We ...
. However, not all seeds are edible for humans. Large seeds, such as those from a
lemon The lemon, ''Citrus limon'', is a species of small evergreen In botany Botany, also called , plant biology or phytology, is the science Science (from the Latin word ''scientia'', meaning "knowledge") is a systematic enterprise ...

lemon
, pose a choking hazard, while seeds from
cherries A cherry is the fruit In botany, a fruit is the seed-bearing structure in flowering plants (also known as angiosperms) formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate seeds. Edible fru ...

cherries
and
apple An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple fruit tree, trees are agriculture, cultivated worldwide and are the most widely grown species in the genus ''Malus''. The tree originated in Central Asia, wher ...

apple
s contain
cyanide A cyanide is a chemical compound A chemical compound is a chemical substance composed of many identical molecules (or molecular entity, molecular entities) composed of atoms from more than one chemical element, element held together by che ...

cyanide
which could be poisonous only if consumed in large volumes. Birds are also well-known for feeding on seeds (for more information, see ).
Fruit In botany Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the ...

Fruit
s are the ripened ovaries of plants, including the seeds within. Many plants and animals have coevolved such that the fruits of the former are an attractive food source to the latter, because animals that eat the fruits may excrete the seeds some distance away. Animals that eat fruits are known as
frugivore A frugivore is an animal that thrives mostly on raw fruits or succulent fruit-like produce of plants such as roots, shoots, nuts and seeds. Approximately 20% of mammalian herbivores eat fruit. Frugivores are highly dependent on the abundance and ...
s. One such coevolutionary relationship involves
primates A primate ( ) (from Latin , from 'prime, first rank') is a eutherian mammal constituting the Taxonomy (biology), taxonomic order (biology), order Primates (). Primates arose 85–55 million years ago first from small Terrestrial animal, ...
, who are primarily frugivorous. Fruits, therefore, make up a significant part of the diets of most cultures. Some botanical fruits, such as tomatoes, pumpkins, and eggplants, are eaten as vegetables. (For more information, see list of fruits.) Vegetables are a second type of plant matter that is commonly eaten as food. These include root vegetables (potatoes and carrots), bulbs (onion family), leaf vegetables (spinach and lettuce), :Stem vegetables, stem vegetables (bamboo shoots and asparagus), and :Inflorescence vegetables, inflorescence vegetables (globe artichokes and broccoli and other vegetables such as cabbage or cauliflower).


Animals

Animals are used as food either directly or indirectly by the products they produce. Meat is an example of a direct product taken from an animal, which comes from muscle systems or from organ (anatomy), organs (offal). Food products produced by animals include milk produced by mammary glands, which in many cultures is drunk or processed into dairy products (cheese, butter, etc.). In addition, birds and other animals lay Egg (food), eggs, which are often eaten, and bees produce honey, a reduced nectar from flowers, which is a popular sweetener in many cultures. Some cultures blood as food, consume blood, sometimes in the form of blood sausage, as a thickener for sauces, or in a Curing (food preservation), cured, Salting (food), salted form for times of food scarcity, and others use blood in stews such as jugging, jugged hare. Some cultures and people do not consume meat or animal food products for cultural, dietary, health, ethical, or ideological reasons. Vegetarians choose to forgo food from animal sources to varying degrees. Vegans do not consume any foods that are or contain ingredients from an animal source.


Classifications and types of food

: ''Broad classifications are covered below. For regional types, see #Cuisine, Cuisine.''


Adulterated food

Adulteration is a legal term meaning that a food product fails to meet the legal standards. One form of adulteration is an addition of another substance to a food item in order to increase the quantity of the food item in raw form or prepared form, which may result in the loss of actual quality of food item. These substances may be either available food items or non-food items. Among meat and meat products some of the items used to adulterate are water or ice, carcasses, or carcasses of animals other than the animal meant to be consumed.


Camping food

Camping food includes ingredients used to prepare food suitable for backcountry camping and backpacking (wilderness), backpacking. The foods differ substantially from the ingredients found in a typical home kitchen. The primary differences relate to campers' and backpackers' special needs for foods that have appropriate cooking time, perishability, weight, and nutritional content. To address these needs, camping food is often made up of either freeze-dried, Meal, Ready-to-Eat, precooked or dehydrated ingredients. Many campers use a combination of these foods. Freeze-drying requires the use of heavy machinery and is not something that most campers are able to do on their own. Freeze-dried ingredients are often considered superior to dehydrated ingredients however because they rehydrate at camp faster and retain more flavor than their dehydrated counterparts. Freeze-dried ingredients take so little time to rehydrate that they can often be eaten without cooking them first and have a texture similar to a crunchy chip. food dehydration, Dehydration can reduce the weight of the food by sixty to ninety percent by removing water through evaporation. Some foods dehydrate well, such as onions, peppers, and tomatoes. Dehydration often produces a more compact, albeit slightly heavier, end result than freeze-drying. Surplus precooked military Meals, Meal, Ready-to-Eat, Meals, Ready-to-Eat (MREs) are sometimes used by campers. These meals contain pre-cooked foods in retort pouches. A retort pouch is a plastic and metal foil laminate pouch that is used as an alternative to traditional industrial canning methods.


Diet food

Diet food or dietetic food refers to any food or beverage whose recipe is altered to reduce fat, carbohydrates, abhor/adhore sugar in order to make it part of a weight loss program or Dieting, diet. Such foods are usually intended to assist in weight loss or a change in body type, although bodybuilding supplements are designed to aid in gaining weight or muscle. The process of making a diet version of a food usually requires finding an acceptable low-food-energy substitute for some high-food-energy ingredient. This can be as simple as replacing some or all of the food's sugar with a sugar substitute as is common with diet soft drinks such as Coca-Cola (for example Diet Coke). In some snacks, the food may be baked instead of fried thus reducing the food energy. In other cases, low-fat ingredients may be used as replacements. In whole grain foods, the higher fiber content effectively displaces some of the starch components of the flour. Since certain fibers have no food energy, this results in a modest energy reduction. Another technique relies on the intentional addition of other reduced-food-energy ingredients, such as resistant starch or dietary fiber, to replace part of the flour and achieve a more significant energy reduction.


Finger food

Finger food is food meant to be eaten directly using the hands, in contrast to food eaten with a knife and fork, spoon, chopsticks, or other cutlery, utensils. In some cultures, food is almost always eaten with the hands; for example, Ethiopian cuisine is eaten by rolling various dishes up in ''injera''
bread Bread is a staple food prepared from a dough of flour and water, usually by baking. Throughout recorded history, it has been a prominent food in large parts of the world. It is one of the oldest man-made foods, having been of significant impor ...

bread
. Foods considered street foods are frequently, though not exclusively, finger foods. In the Western Hemisphere, western world, finger foods are often either appetizers (hors d'œuvres) or entree/main course items. Examples of these are miniature meat pies, sausage rolls, sausages on sticks, cheese and olives on sticks, chicken drumsticks or Buffalo wing, wings, spring rolls, miniature quiches, samosas, sandwiches, Merenda or other such based foods, such as pitas or items in buns, bhajjis, potato wedges, vol au vents, several other such small items and risotto balls (arancini). Other well-known foods that are generally eaten with the hands include hamburgers, pizza, Chips (hot food), chips, hot dogs, fruit and
bread Bread is a staple food prepared from a dough of flour and water, usually by baking. Throughout recorded history, it has been a prominent food in large parts of the world. It is one of the oldest man-made foods, having been of significant impor ...

bread
. In East Asia, foods like pancakes or flatbreads (''bing'' 饼) and street foods such as chuanr, chuan (串, also pronounced ''chuan'') are often eaten with the hands.


Fresh food

Fresh food is food which has not been food preservation, preserved and has not food spoilage, spoiled yet. For vegetables and fruits, this means that they have been recently harvested and treated properly postharvest; for meat, it has recently been animal slaughter, slaughtered and butchered; for fish as food, fish, it has been recently caught or harvested and kept cold. Dairy products are fresh and will spoil quickly. Thus, fresh cheese is cheese which has not been dried or salted for aging. Soured cream may be considered "fresh" (crème fraîche). Fresh food has not been food drying, dried, Smoking (cooking), smoked, salting (food), salted, frozen food, frozen, canning, canned, pickling, pickled, or otherwise preserved.


Frozen food

Freezing food preserves it from the time it is prepared to the time it is eaten. Since early times, farmers, fishermen, and trappers have preserved grains and produce in unheated buildings during the winter season. Freezing food slows down decomposition by turning residual moisture into ice, inhibiting the growth of most bacterial species. In the food industry, food commodity industry, there are two processes: mechanical and cryogenic (or flash freezing). The kinetics of the freezing is important to preserve food quality and texture. Quicker freezing generates smaller ice crystals and maintains cellular structure. Cryogenic freezing is the quickest freezing technology available utilizing the extremely low temperature of liquid nitrogen . Preserving food in domestic kitchens during modern times is achieved using household freezers. Accepted advice to householders was to freeze food on the day of purchase. An initiative by a supermarket group in 2012 (backed by the UK's Waste & Resources Action Programme) promotes the freezing of food "as soon as possible up to the product's 'use by' date". The Food Standards Agency was reported as supporting the change, providing the food had been stored correctly up to that time.


Functional food

A functional food is a food given an additional wikt:function, function (often one related to health-promotion or disease prevention) by adding new ingredients or more of existing ingredients. The term may also apply to traits purposely plant breeding, bred into existing edible plants, such as purple or gold potatoes having enriched anthocyanin or carotenoid contents, respectively. Functional foods may be "designed to have physiological benefits and/or reduce the risk of chronic disease beyond basic nutritional functions, and may be similar in appearance to conventional food and consumed as part of a regular diet". The term was first used in Japan in the 1980s where there is a government approval process for functional foods called Foods for Specified Health Use (FOSHU).


Health food

Health food is food marketed to provide human health effects beyond a normal healthy diet required for human nutrition. Foods marketed as health foods may be part of one or more categories, such as natural foods, organic foods, whole foods, vegetarian foods or dietary supplements. These products may be sold in health food stores or in the health food or organic sections of grocery stores.


Healthy food

A healthy diet is a dieting, diet that helps to maintain or improve overall health. A healthy diet provides the body with essential Human nutrition, nutrition: fluid, macronutrients, micronutrients, and adequate calories. For people who are healthy, a healthy diet is not complicated and contains mostly fruits, vegetables, and whole grains, and includes little to no processed food and sweetened beverages. The requirements for a healthy diet can be met from a variety of plant-based and animal-based foods, although a non-animal source of vitamin B12 is needed for those following a vegan diet. Various List of nutrition guides, nutrition guides are published by medical and governmental institutions to educate individuals on what they should be eating to be healthy. Nutrition facts labels are also mandatory in some countries to allow consumers to choose between foods based on the components relevant to health. A healthy lifestyle includes getting exercise every day along with eating a healthy diet. A healthy lifestyle may lower disease risks, such as obesity, heart disease, Diabetes mellitus type 2, type 2 diabetes, hypertension and cancer. There are specialized healthy diets, called medical nutrition therapy, for people with various diseases or conditions. There are also prescientific ideas about such specialized diets, as in Chinese food therapy, dietary therapy in traditional Chinese medicine. The
World Health Organization The World Health Organization (WHO) is a specialized agency of the United Nations United Nations Specialized Agencies are autonomous organizations working with the United Nations and each other through the co-ordinating machinery of the Unit ...
(WHO) makes the following 5 recommendations with respect to both populations and individuals: # Maintain a healthy weight by eating roughly the same number of calories that your body is using. # Limit intake of fats. Not more than 30% of the total calories should come from fats. Prefer unsaturated fats to saturated fats. Avoid trans fats. # Eat at least 400 grams of fruits and vegetables per day (potatoes, sweet potatoes, cassava and other starchy roots do not count). A healthy diet also contains legumes (e.g. lentils, beans), whole grains and nut (fruit), nuts. # Limit the intake of simple sugars to less than 10% of calorie (below 5% of calories or 25 grams may be even better) # Limit
salt Salt is a mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure fo ...

salt
/ sodium from all sources and ensure that Iodised salt, salt is iodized. Less than 5 grams of salt per day can reduce the risk of cardiovascular disease.


Live food

Live food is living food for carnivore, carnivorous or omnivore, omnivorous animals kept in captivity (animal), captivity; in other words, small animals such as insects or mouse, mice fed to larger carnivorous or omnivorous species kept either in a zoo or as a pet. Live food is commonly used as feed for a variety of species of exotic pets and zoo animals, ranging from alligators to various snakes, frogs and lizards, but also including other, non-reptile, non-amphibian carnivores and omnivores (for instance, pet skunk, skunks, which are omnivorous mammals, can technically be fed a limited amount of live food, though this is not a common practice). Common live food ranges from cricket (insect), crickets (used as an inexpensive form of feed for carnivorous and omnivorous reptiles such as bearded dragons and commonly available in pet stores for this reason), waxworms, mealworms and to a lesser extent cockroaches and locusts, to small birds and mammals such as mice or chickens.


Medical food

Medical foods are foods that are specially formulated and intended for the dietary management of a disease that has distinctive nutritional needs that cannot be met by normal diet alone. In the United States they were defined in the
Food and Drug Administration The United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country Continental United States, primarily located in North America. It consists of 50 U.S. state, st ...
's 1988 Orphan Drug Act Amendments and are subject to the general food and safety labeling requirements of the Federal Food, Drug, and Cosmetic Act. In Europe the European Food Safety Authority established definitions for "foods for special medical purposes" (FSMPs) in 2015. Medical foods, called "food for special medical purposes" in Europe, are distinct from the broader category of foods for special dietary use, from traditional foods that bear a health claim, and from dietary supplements. In order to be considered a medical food the product must, at a minimum: * be a food for oral ingestion or tube feeding (nasogastric tube) * be labeled for the dietary management of a specific medical disorder, disease or condition for which there are distinctive nutritional requirements, and * be intended to be used under medical supervision. Medical foods can be classified into the following categories: * Nutritionally complete formulas * Nutritionally incomplete formulas * Formulas for metabolic disorders * Oral rehydration products


Natural foods

Natural foods and "all-natural foods" are widely used terms in food labeling and marketing with a variety of definitions, most of which are vague. The term is often assumed to imply foods that are not processed and whose ingredients are all natural products (in the chemist's sense of that term), thus conveying an appeal to nature. But the lack of standards in most jurisdictions means that the term assures nothing. In some countries, the term "natural" is defined and enforced. In others, such as the United States, it is not enforced. “Natural foods” are often assumed to be foods that are not Food processing, processed, or do not contain any food additives, or do not contain particular additives such as hormones, antibiotics, sweeteners, food colors, or Flavouring, flavorings that were not originally in the food. In fact, many people (63%) when surveyed showed a preference for products labeled "natural" compared to the unmarked counterparts, based on the common belief (86% of polled consumers) that the term "natural" indicated that the food does not contain any artificial ingredients. The terms are variously used and misused on labels and in advertisements. The international
Food and Agriculture Organization The Food and Agriculture Organization of the United Nations (FAO)french: Organisation des Nations unies pour l'alimentation et l'agriculture; it, Organizzazione delle Nazioni Unite per l'Alimentazione e l'Agricoltura is a list of specialized ...
’s ''Codex Alimentarius'' does not recognize the term “natural” but does have a standard for organic foods.


Negative-calorie food

A negative-calorie food is food that supposedly requires more
food energy Food energy is chemical energy Chemical energy is the energy of chemical substance A chemical substance is a form of matter In classical physics and general chemistry, matter is any substance that has mass and takes up space by havin ...
to be digestion, digested than the food provides. Its thermic effect or specific dynamic action – the caloric "cost" of digesting the food – would be greater than its food energy content. Despite its recurring popularity in weight loss, dieting guides, there is no scientific evidence supporting the idea that any food is calorically negative. While some chilled beverages are calorically negative, the effect is minimal and drinking large amounts of water water intoxication, can be dangerous.


Organic food

Organic food is food produced by methods that comply with the standards of organic farming. Standards vary worldwide, but organic farming in general features practices that strive to cycle resources, promote ecological balance, and conserve biodiversity. Organizations regulating organic products may restrict the use of certain pesticides and fertilizers in farming. In general, organic foods are also usually not processed using Food irradiation, irradiation, industrial solvents or synthetic food additives. Currently, the European Union, the United States, Canada, Mexico, Japan, and many other countries require producers to obtain Organic certification, special certification in order to market food as organic within their borders. In the context of these regulations, organic food is produced in a way that complies with organic standards set by regional organizations, national governments, and international organizations. Although the produce of kitchen gardens may be organic, selling food with an organic label is regulated by governmental food safety authorities, such as the National Organic Program, US Department of Agriculture (USDA) or European Commission (EC). Fertilizing and the use of pesticides in conventional farming has caused, and is causing, enormous damage worldwide to local ecosystems, biodiversity, groundwater and drinking water supplies, and sometimes farmer health and fertility. These environmental, economic and health issues are intended to be minimized or avoided in organic farming. From a consumers perspective, there is not sufficient evidence in scientific and medical literature to support claims that organic food is Food safety, safer or healthier to eat than conventionally grown food. While there may be some differences in the nutrient and antinutrient contents of organically- and conventionally-produced food, the variable nature of food production and handling makes it difficult to generalize results.Blair, Robert. (2012). Organic Production and Food Quality: A Down to Earth Analysis. Wiley-Blackwell, Oxford. pp. 72, 223. Claims that organic food tastes better are generally not supported by tests.


Peasant foods

Peasant foods are dishes specific to a particular culture, made from accessible and inexpensive ingredients, and usually prepared and seasoned to make them more palatable. They often form a significant part of the Diet (nutrition), diets of people who live in poverty, or have a lower income compared to the average for their society or country. Peasant foods have been described as being the diet of peasants, that is, tenant farmer, tenant or poorer farmers and their Farmworker, farm workers, and by extension, of other cash-poor people. They may use ingredients, such as offal and less-tender cuts of meat, which are not as marketable as a cash crop. Characteristic recipes often consist of hearty one-dish meals, in which chunks of meat and various vegetables are eaten in a savory broth, with bread or other
staple food A staple food, food staple, or simply a staple, is a food Food is any substance consumed to provide Nutrient, nutritional support for an organism. Food is usually of plant, animal or Fungus, fungal origin, and contains essential nutrients, ...

staple food
. Sausages are also amenable to varied readily available ingredients, and they themselves tend to contain offal and grains. Peasant foods often involve skilled preparation by knowledgeable cooks using inventiveness and skills passed down from earlier generations. Such dishes are often prized as ethnic foods by other cultures and by descendants of the native culture who still desire these traditional dishes.


Prison food

Prison food is the term for meals served to prisoners while incarcerated in correctional institutions. While some prisons prepare their own food, many use staff from on-site catering companies. Many prisons today support the requirements of specific religions, as well as vegetarianism. It is said that prison food of many developed countries is adequate to maintain health and dieting.


Seasonal food

"Seasonal" here refers to the times of the year when the harvest or the flavor of a given type of food is at its peak. This is usually the time when the item is harvested, with some exceptions; an example being sweet potatoes which are best eaten quite a while after harvest. It also appeals to people who prefer a low carbon diet that reduces the greenhouse gas emissions resulting from food consumption (Food miles).


Shelf-stable food

Shelf-stable food (sometimes ambient food) is food of a type that can be safely stored at room temperature in a sealed container. This includes foods that would normally be stored refrigerated but which have been food processing, processed so that they can be safely stored at room or ambient temperature for a usefully long shelf life. Various food preservation and packaging techniques are used to extend a food's shelf life. Decreasing the amount of water activity, available water in a product, increasing its acidity, or Food irradiation, irradiating or otherwise sterilizing the food and then sealing it in an air-tight container are all ways of depriving
bacteria Bacteria (; common noun bacteria, singular bacterium) are ubiquitous, mostly free-living organisms often consisting of one Cell (biology), biological cell. They constitute a large domain (biology), domain of prokaryotic microorganisms. Typ ...

bacteria
of suitable conditions in which to thrive. All of these approaches can all extend a food's shelf life without unacceptably changing its taste or texture. For some foods, alternative ingredients can be used. Common oils and
fat In nutrition Nutrition is the biochemical Biochemistry or biological chemistry, is the study of chemical processes within and relating to living organisms. A sub-discipline of both chemistry and biology, biochemistry may be divided ...

fat
s become rancidification, rancid relatively quickly if not refrigerated; replacing them with hydrogenated oils delays the onset of rancidity, increasing shelf life. This is a common approach in industrial food production, but recent concerns about health hazards associated with trans fats have led to their strict control in several jurisdictions. Even where trans fats are not prohibited, in many places there are new labeling laws (or rules), which require information to be printed on packages, or to be published elsewhere, about the amount of trans fat contained in certain products.


Space food

Space food is a type of food product created and Food processing, processed for consumption by astronauts in outer space. The food has specific requirements of providing balanced nutrition for individuals working in space while being easy and safe to store, prepare and consume in the machinery-filled Weightlessness, weightless environments of crewed spacecraft. In recent years, space food has been used by various nations engaging in space programs as a way to share and show off their cultural identity and facilitate intercultural communication. Although astronauts consume a wide variety of foods and beverages in space, the initial idea from The Man in Space Committee of the Space Science Board in 1963 was to supply astronauts with a formula diet that would supply all the needed vitamins and nutrients.


Traditional food

Traditional foods are foods and Dish (food), dishes that are passed through generations or which have been consumed many generations. Traditional foods and dishes are traditional in nature, and may have a historic precedent in a national dish, regional cuisine or local
cuisine A cuisine is a style of cooking characterized by distinctive ingredients, List of cooking techniques, techniques and dish (food), dishes, and usually associated with a specific culture or geographic region. Regional food preparation traditions ...

cuisine
. Traditional foods and beverages may be produced as homemade, by restaurants and small manufacturers, and by large food processing plant facilities. Some traditional foods have geographical indications and traditional specialities in the European Union designations per European Union schemes of geographical indications and traditional specialties: Protected designation of origin (PDO), Protected geographical indication (PGI) and Geographical indications and traditional specialities in the European Union#Traditional specialities guaranteed (TSG), Traditional specialities guaranteed (TSG). These standards serve to promote and protect names of quality agricultural products and foodstuffs. This article also includes information about traditional beverages.


Whole food

Whole foods are plant foods that are Food processing, unprocessed and Refining, unrefined, or processed and refined as little as possible, before being consumed. Examples of whole foods include whole grains, tubers,
legume A legume () is a plant Plants are predominantly photosynthetic Photosynthesis is a process used by plants and other organisms to Energy transformation, convert light energy into chemical energy that, through cellular respiration, can ...

legume
s, fruits, vegetables. There is some confusion over the usage of the term surrounding the inclusion of certain foods, in particular animal foods. The modern usage of the term whole foods diet is now widely synonymous with "whole foods plant-based diet" with animal products, oil and salt no longer constituting whole foods. The earliest use of the term in the post-industrial age appears to be in 1946 in The Farmer, a quarterly magazine published and edited from his farm by Frank Newman Turner, F. Newman Turner, a writer and pioneering organic farmer. The magazine sponsored the establishment of the Producer-Consumer Whole Food Society Ltd, with Newman Turner as president and Derek Randal as vice-president.Conford, P.(2011) The Development of the Organic Network, p. 417. Edinburgh, Floris Books . Whole food was defined as "mature produce of field, orchard, or garden without subtraction, addition, or alteration grown from seed without chemical dressing, in fertile soil manured solely with animal and vegetable wastes, and composts therefrom, and ground, raw rock and without chemical manures, sprays, or insecticides," having intent to connect suppliers and the growing public demand for such food. Such diets are rich in whole and unrefined foods, like whole grains, dark green and yellow/orange-fleshed vegetables and fruits,
legume A legume () is a plant Plants are predominantly photosynthetic Photosynthesis is a process used by plants and other organisms to Energy transformation, convert light energy into chemical energy that, through cellular respiration, can ...

legume
s,
nuts Nut often refers to: * Nut (fruit) A nut is a fruit composed of an inedible hard shell and a seed, which is generally edible. In general usage and in a Culinary nut, culinary sense, a wide variety of dried seeds are called nuts, but in a botan ...
and seeds.


Taste perception

Animals, specifically humans, have five different types of tastes: sweet, sour, saltiness, salty, bitter (taste), bitter, and umami. As animals have Evolution, evolved, the tastes that provide the most energy (sugar and
fat In nutrition Nutrition is the biochemical Biochemistry or biological chemistry, is the study of chemical processes within and relating to living organisms. A sub-discipline of both chemistry and biology, biochemistry may be divided ...

fat
s) are the most pleasant to eat while others, such as bitter (taste), bitter, are not enjoyable. Water, while important for survival, has no taste. Fats, on the other hand, especially saturated fats, are thicker and rich and are thus considered more enjoyable to eat.


Sweet

Generally regarded as the most pleasant taste, sweetness is almost always caused by a type of simple sugar such as glucose or fructose, or disaccharides such as sucrose, a molecule combining glucose and fructose.New Oxford American Dictionary Complex carbohydrates are long chains and thus do not have the sweet taste. Artificial sweeteners such as sucralose are used to mimic the sugar molecule, creating the sensation of sweet, without the calories. Other types of sugar include raw sugar, which is known for its amber color, as it is unprocessed. As sugar is vital for energy and survival, the taste of sugar is pleasant. The stevia plant contains a compound known as steviol which, when extracted, has 300 times the sweetness of sugar while having minimal impact on blood sugar.


Sour

Sourness is caused by the taste of acids, such as vinegar in alcoholic beverages. Sour foods include citrus, specifically
lemon The lemon, ''Citrus limon'', is a species of small evergreen In botany Botany, also called , plant biology or phytology, is the science Science (from the Latin word ''scientia'', meaning "knowledge") is a systematic enterprise ...

lemon
s, Lime (fruit), limes, and to a lesser degree Orange (fruit), oranges. Sour is evolutionarily significant as it is a sign for a food that may have gone rancidity, rancid due to bacteria. Many foods, however, are slightly acidic, and help stimulate the taste buds and enhance flavor.


Salty

Saltiness is the taste of alkali metal ions such as sodium and potassium. It is found in almost every food in low to moderate proportions to enhance flavor, although to eat pure salt is regarded as highly unpleasant. There are many different types of salt, with each having a different degree of saltiness, including sea salt, fleur de sel, kosher salt, mined salt, and grey salt. Other than enhancing flavor, its significance is that the body needs and maintains a delicate electrolyte balance, which is the kidney's function. Salt may be iodized, meaning iodine has been added to it, a necessary nutrient that promotes thyroid function. Some canned foods, notably soups or packaged broths, tend to be high in salt as a means of preserving the food longer. Historically salt has long been used as a meat preservative as salt promotes water excretion. Similarly, dried foods also promote food safety.


Bitter

Bitter (taste), Bitterness is a sensation often considered unpleasant characterized by having a sharp, pungent taste. Unsweetened dark chocolate, caffeine, lemon rind, and some types of fruit are known to be bitter.


Umami


Cuisine

Many scholars claim that the rhetorical function of food is to represent the culture of a country, and that it can be used as a form of communication. According to Goode, Curtis and Theophano, food "is the last aspect of an ethnic culture to be lost". Many cultures have a recognizable cuisine, a specific set of cooking traditions using various spices or a combination of flavors unique to that culture, which evolves over time. Other differences include preferences (hot or cold, spicy, etc.) and practices, the study of which is known as gastronomy. Many cultures have diversified their foods by means of preparation, cooking methods, and manufacturing. This also includes a complex food trade which helps the cultures to economically survive by way of food, not just by consumption. Some popular types of ethnic foods include Italian cuisine, Italian, French cuisine, French, Japanese cuisine, Japanese, Chinese cuisine, Chinese, Cuisine of the United States, American, Cajun cuisine, Cajun, Thai cuisine, Thai, African cuisine, African, Indian cuisine, Indian and Nepalese cuisine, Nepalese. Various cultures throughout the world study the dietary analysis of food Habit (psychology), habits. While evolutionarily speaking, as opposed to culturally, humans are omnivores, religion and social constructs such as morality, activism, or environmentalism will often affect which foods they will consume. Food is eaten and typically enjoyed through the sense of taste, the perception of flavor from eating and drinking. Certain tastes are more enjoyable than others, for evolutionary purposes.


Presentation

Aesthetically pleasing and eye-appealing food presentations can encourage people to consume foods. A common saying is that people "eat with their eyes". Food presented in a clean and appetizing way will encourage a good flavor, even if unsatisfactory.Food Texture, Andrew J. Rosenthal Texture (food), Texture plays a crucial role in the enjoyment of eating foods. Contrasts in textures, such as something crunchy in an otherwise smooth dish, may increase the appeal of eating it. Common examples include adding granola to
yogurt Yogurt (; , from tr, yoğurt) also spelled yoghurt, yogourt or yoghourt, is a food produced by bacteria Bacteria (; common noun bacteria, singular bacterium) are a type of biological cell The cell (from Latin ''cella'', meaning ...

yogurt
, adding croutons to a salad or soup, and toasting bread to enhance its crunchiness for a smooth topping, such as jam or butter. Another universal phenomenon regarding food is the appeal of contrast in taste and presentation. For example, such opposite flavors as sweetness and saltiness tend to go well together, as in kettle corn and
nuts Nut often refers to: * Nut (fruit) A nut is a fruit composed of an inedible hard shell and a seed, which is generally edible. In general usage and in a Culinary nut, culinary sense, a wide variety of dried seeds are called nuts, but in a botan ...
.


Food preparation

While many foods can be eaten raw, many also undergo some form of preparation for reasons of safety, palatability, Mouthfeel, texture, or flavor. At the simplest level this may involve washing, cutting, trimming, or adding other foods or ingredients, such as spices. It may also involve mixing, heating or cooling, pressure cooking, fermentation, or combination with other food. In a home, most food preparation takes place in a kitchen. Some preparation is done to enhance the taste or aesthetic appeal; other preparation may help to Food preservation, preserve the food; others may be involved in cultural identity. A meal is made up of food which is prepared to be eaten at a specific time and place.


Animal preparation

The preparation of animal-based food usually involves Slaughter (livestock), slaughter, evisceration (organ removal), evisceration, hanging, portioning, and Rendering (food processing), rendering. In developed countries, this is usually done outside the home in slaughterhouses, which are used to process animals en masse for meat production. Many countries regulate their slaughterhouses by law. For example, the United States has established the Humane Slaughter Act of 1958, which requires that an animal be stunned before killing. This act, like those in many countries, exempts slaughter in accordance with religious law, such as kosher, shechita, and dhabīḥah halal. Strict interpretations of kashrut require the animal to be fully aware when its carotid artery is cut. On the local level, a butcher may commonly break down larger animal meat into smaller manageable cuts, and pre-wrap them for commercial sale or wrap them to order in butcher paper. In addition, fish and seafood may be fabricated into smaller cuts by a fishmonger. However, fish butchery may be done onboard a fishing vessel and quick-frozen for the preservation of quality.


Raw food preparation

Certain cultures highlight animal and vegetable foods in a Raw foodism, raw state. Salads consisting of raw vegetables or fruits are common in many cuisines. Sashimi in Japanese cuisine consists of raw sliced fish or other meat, and sushi often incorporates raw fish or seafood. Steak tartare and salmon tartare are dishes made from diced or ground raw beef or salmon, mixed with various ingredients and served with baguettes, brioche, or frites. In Italy, carpaccio is a dish of very thinly sliced raw beef, drizzled with a vinaigrette made with olive oil. The health food movement known as raw foodism promotes a mostly vegan diet of raw fruits, vegetables, and grains prepared in various ways, including juicing, food dehydration, sprouting, and other methods of preparation that do not heat the food above . An example of a raw meat dish is ceviche, a Latin American dish made with raw meat that is "cooked" from the highly acidic citric juice from lemons and limes along with other aromatics such as garlic.


Cooking

The term "cooking" encompasses a vast range of methods, tools, and combinations of ingredients to improve the flavor or digestibility of food. Cooking technique, known as culinary art, generally requires the selection, measurement, and combining of ingredients in an ordered procedure in an effort to achieve the desired result. Constraints on success include the variability of ingredients, ambient conditions, tools, and the skill of the individual cook. The diversity of cooking worldwide is a reflection of the myriad nutritional, aesthetic, agricultural, economic, cultural, and religious considerations that affect it.Mead, 11–19. Cooking requires applying heat to a food which usually, though not always, chemically changes the molecules, thus changing its flavor, Mouthfeel, texture, appearance, and nutritional properties. Cooking certain proteins, such as egg whites, meats, and fish, denatures the protein, causing it to firm. There is archaeological evidence of roasted foodstuffs at ''Homo erectus'' campsites dating from 420,000 years ago. Boiling as a means of cooking requires a container, and has been practiced at least since the 10th millennium BC with the introduction of pottery.


=Cooking equipment

= There are many different types of equipment used for cooking. Ovens are mostly hollow devices that get very hot (up to ) and are used for baking or roasting and offer a dry-heat cooking method. Different cuisines will use different types of ovens. For example, Indian culture uses a tandoor oven, which is a cylindrical clay oven which operates at a single high temperature. Western kitchens use variable temperature convection ovens, conventional ovens, toaster ovens, or non-radiant heat ovens like the microwave oven. Classic Italian cuisine includes the use of a brick oven containing burning wood. Ovens may be wood-fired, coal-fired, natural gas, gas, electric, or oil-fired. Various types of cook-tops are used as well. They carry the same variations of fuel types as the ovens mentioned above. Cook-tops are used to heat vessels placed on top of the heat source, such as a sauté pan, sauce pot, frying pan, or pressure cooker. These pieces of equipment can use either a moist or dry cooking method and include methods such as steaming, simmering, boiling, and Poaching (cooking), poaching for moist methods, while the dry methods include sautéing, pan frying, and deep-frying. In addition, many cultures use grills for cooking. A Grill (cooking), grill operates with a radiant heat source from below, usually covered with a metal grid and sometimes a cover. An open-pit barbecue in the American south is one example along with the American style outdoor grill fueled by wood, liquid propane, or charcoal along with soaked wood chips for smoking. A Mexican cuisine, Mexican style of barbecue is called barbacoa, which involves the cooking of meats such as whole sheep over an open fire. In Argentina, an asado (Spanish for "grilled") is prepared on a grill held over an open pit or fire made upon the ground, on which a whole animal or smaller cuts are grilled.


Restaurants

Restaurants employ chefs to prepare the food, and waiting staff, waiters to serve customers at the table. The term restaurant comes from an old term for a restorative broth, meat broth; this broth (or bouillon) was served in elegant outlets in Paris from the mid 18th century. These refined "restaurants" were a marked change from the usual basic eateries such as inns and taverns, and some had developed from early Parisian cafés, such as Café Procope, by first serving bouillon, then adding other cooked food to their menus. Commercial eateries existed during the Roman period, with evidence of 150 "thermopolia", a form of fast food restaurant, found in Pompeii, and urban sales of prepared foods may have existed in China during the Song dynasty. In 2005, the population of the United States spent $496 billion on out-of-home dining. Expenditures by type of out-of-home dining were as follows: 40% in full-service restaurants, 37.2% in limited service restaurants (fast food), 6.6% in schools or colleges, 5.4% in bars and vending machines, 4.7% in hotels and motels, 4.0% in recreational places, and 2.2% in others, which includes military bases.


Economy

Food systems have complex economic and social Food value chain, value chains that effect many parts of the global economy.


Production

Most food has always been obtained through agriculture. With increasing concern over both the methods and products of modern industrial agriculture, there has been a growing trend toward sustainable agriculture, sustainable agricultural practices. This approach, partly fueled by consumer demand, encourages biodiversity, local self-reliance and organic farming methods. Major influences on food production include international organizations (e.g. the World Trade Organization and Common Agricultural Policy), national government policy (or law), and war.Messer, 53–91. Several organisations have begun calling for a new kind of agriculture in which agroecosystems provide food but also support vital ecosystem services so that Fertility (soil), soil fertility and biodiversity are maintained rather than compromised. According to the International Water Management Institute and UNEP, well-managed agroecosystems not only provide food, fiber and animal products, they also provide services such as flood mitigation, groundwater recharge, erosion control and habitats for plants, birds, fish and other animals.


Food manufacturing

Packaged foods are manufactured outside the home for purchase. This can be as simple as a butcher preparing meat, or as complex as a modern international
food industry The food industry is a complex, global network of diverse businesses that supplies most of the food consumed by the World population, world's population. The term food industries covers a series of industrial activities directed at the producti ...
. Early food processing techniques were limited by available food preservation, packaging, and transportation. This mainly involved salting (food), salting, Curing (food preservation), curing, curdling, drying (food), drying, pickling, fermentation (food), fermenting, and smoking (food), smoking. Food manufacturing arose during the industrial revolution in the 19th century. This development took advantage of new Mass-marketing, mass markets and emerging technology, such as Mill (grinding), milling, preservation, packaging and Packaging and labeling, labeling, and transportation. It brought the advantages of pre-prepared time-saving food to the bulk of ordinary people who did not employ domestic servants.Jango-Cohen At the start of the 21st century, a two-tier structure has arisen, with a few international food processing giants controlling a wide range of well-known food brands. There also exists a wide array of small local or national food processing companies. Advanced technologies have also come to change food manufacture. Computer-based control systems, sophisticated Food processing, processing and packaging methods, and logistics and food distribution, distribution advances can enhance product quality, improve food safety, and reduce costs.


International food imports and exports

The World Bank reported that the European Union was the top food importer in 2005, followed at a distance by the US and Japan. United Kingdom, Britain's need for food was especially well-illustrated in World War II. Despite the implementation of Rationing in the United Kingdom, food rationing, Britain remained dependent on food imports and the result was a long term engagement in the Battle of the Atlantic. Food is traded and marketed on a global basis. The variety and availability of food is no longer restricted by the diversity of locally grown food or the limitations of the local growing season. Between 1961 and 1999, there was a 400% increase in worldwide food exports. Some countries are now economically dependent on food exports, which in some cases account for over 80% of all exports. In 1994, over 100 countries became signatories to the Uruguay Round of the General Agreement on Tariffs and Trade in a dramatic increase in trade liberalization. This included an agreement to reduce subsidies paid to farmers, underpinned by the World Trade Organization, WTO enforcement of Agricultural policy, agricultural subsidy, Tax, tariff, and trade, tariffs, import Quota Share, quotas, and settlement of trade disputes that cannot be bilaterally resolved. Where trade barriers are raised on the disputed grounds of public health and safety, the WTO refer the dispute to the Codex Alimentarius Commission, which was founded in 1962 by the United Nations
Food and Agriculture Organization The Food and Agriculture Organization of the United Nations (FAO)french: Organisation des Nations unies pour l'alimentation et l'agriculture; it, Organizzazione delle Nazioni Unite per l'Alimentazione e l'Agricoltura is a list of specialized ...
and the World Health Organization. Trade liberalization has greatly affected world food trade.


Marketing and retailing

Food marketing brings together the producer and the consumer. The marketing of even a single food product can be a complicated process involving many producers and companies. For example, fifty-six companies are involved in making one canning, can of chicken noodle soup. These businesses include not only chicken and vegetable processors but also the companies that transport the ingredients and those who print labels and manufacture cans. The food marketing system is the largest direct and indirect non-government employer in the United States. In the pre-modern era, the sale of surplus food took place once a week when farmers took their wares on market day into the local village marketplace. Here food was sold to grocers for sale in their local shops for purchase by local consumers. With the onset of industrialization and the development of the food processing industry, a wider range of food could be sold and distributed in distant locations. Typically early grocery shops would be counter-based shops, in which purchasers told the shop-keeper what they wanted, so that the shop-keeper could get it for them. In the 20th century, supermarkets were born. Supermarkets brought with them a self service approach to shopping using shopping carts, and were able to offer quality food at lower cost through economies of scale and reduced staffing costs. In the latter part of the 20th century, this has been further revolutionized by the development of vast warehouse-sized, out-of-town supermarkets, selling a wide range of food from around the world. Unlike food processors, food retailing is a two-tier market in which a small number of very large Corporation, companies control a large proportion of supermarkets. The supermarket giants wield great purchasing power over farmers and processors, and strong influence over consumers. Nevertheless, less than 10% of consumer spending on food goes to farmers, with larger percentages going to advertising, transportation, and intermediate corporations.


Prices


As investment


Problems

Because of its centrality to human life, problems related to access, quality and production of food effect every aspect of human life.


Nutrition and dietary problems

Between the extremes of optimal health and death from starvation or malnutrition, there is an array of disease states that can be caused or alleviated by changes in diet. Deficiencies, excesses, and imbalances in diet can produce negative impacts on health, which may lead to various health problems such as scurvy, obesity, or osteoporosis, Diabetes mellitus type 2, diabetes, cardiovascular diseases as well as psychological and behavioral problems. The science of nutrition attempts to understand how and why specific dietary aspects influence health. Nutrients in food are grouped into several categories. Macronutrients are fat, protein, and carbohydrates. Micronutrients are the
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and vitamins. Additionally, food contains water and dietary fiber. As previously discussed, the body is designed by natural selection to enjoy sweet and fattening foods for evolutionary diets, ideal for Hunter-gatherer, hunters and gatherers. Thus, sweet and fattening foods in nature are typically rare and are very pleasurable to eat. In modern times, with biotechnology, advanced technology, enjoyable foods are easily available to consumers. Unfortunately, this promotes obesity in adults and children alike.


Hunger and starvation

Food deprivation leads to malnutrition and ultimately starvation. This is often connected with famine, which involves the absence of food in entire communities. This can have a devastating and widespread effect on human health and mortality. Rationing is sometimes used to distribute food in times of shortage, most notably during times of war. Starvation is a significant international problem. Approximately 815 million people are undernourished, and over 16,000 children die per day from hunger-related causes. Food deprivation is regarded as a deficit need in Maslow's hierarchy of needs and is measured using famine scales.


Food waste


Policy


Legal definition

Some countries list a legal definition of food, often referring them with the word ''foodstuff''. These countries list food as any item that is to be processed, partially processed, or unprocessed for consumption. The listing of items included as food includes any substance intended to be, or reasonably expected to be, ingested by humans. In addition to these foodstuffs, drink, chewing gum, water, or other items processed into said food items are part of the legal definition of food. Items not included in the legal definition of food include Pet food, animal feed, live animals (unless being prepared for sale in a market), plants prior to harvesting, medicinal products, cosmetics, tobacco and tobacco products, narcotic or psychotropic substances, and residues and contaminants.


Right to food


Food security


International aid

Food aid can benefit people suffering from a shortage of food. It can be used to improve peoples' lives in the short term, so that a society can increase its standard of living to the point that food aid is no longer required. Conversely, badly managed food aid can create problems by disrupting local markets, depressing crop prices, and discouraging food production. Sometimes a cycle of food aid dependence can develop. Its provision, or threatened withdrawal, is sometimes used as a political tool to influence the policies of the destination country, a strategy known as food politics. Sometimes, food aid provisions will require certain types of food be purchased from certain sellers, and food aid can be misused to enhance the markets of donor countries. International efforts to distribute food to the neediest countries are often coordinated by the
World Food Programme The World Food Programme; it, Programma alimentare mondiale; es, Programa Mundial de Alimentos; ar, برنامج الأغذية العالمي, translit=barnamaj al'aghdhiat alealami; russian: Всемирная продовольственн ...

World Food Programme
.


Safety

Foodborne illness, commonly called "food poisoning", is caused by
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bacteria
, toxins, viruses, parasites, and prions. Roughly 7 million people die of food poisoning each year, with about 10 times as many suffering from a non-fatal version.National Institute of Health, MedlinePlus Medical Encyclopedia The two most common factors leading to cases of bacterial foodborne illness are cross-contamination of ready-to-eat food from other uncooked foods and improper temperature control. Less commonly, acute adverse reactions can also occur if chemical contamination of food occurs, for example from improper storage, or use of non-food grade soaps and disinfectants. Food can also be adulterated by a very wide range of articles (known as "foreign bodies") during farming, manufacture, cooking, packaging, distribution, or sale. These foreign bodies can include pests or their droppings, hairs, cigarette butts, wood chips, and all manner of other contaminants. It is possible for certain types of food to become contaminated if stored or presented in an unsafe container, such as a ceramic pot with lead-based glaze. Food poisoning has been recognized as a disease since as early as Hippocrates. The sale of Rancidity, rancid, contaminated, or adulterated food was commonplace until the introduction of hygiene, refrigeration, and vermin controls in the 19th century. Discovery of techniques for killing bacteria using heat, and other microbiological studies by scientists such as Louis Pasteur, contributed to the modern sanitation standards that are ubiquitous in developed nations today. This was further underpinned by the work of Justus von Liebig, which led to the development of modern food storage and food preservation methods. In more recent years, a greater understanding of the causes of food-borne illnesses has led to the development of more systematic approaches such as the Hazard Analysis and Critical Control Points (HACCP), which can identify and eliminate many risks. Recommended measures for ensuring food safety include maintaining a clean preparation area with foods of different types kept separate, ensuring an adequate cooking temperature, and refrigerating foods promptly after cooking. Foods that spoil easily, such as meats, dairy, and seafood, must be prepared a certain way to avoid contaminating the people for whom they are prepared. As such, the rule of thumb is that cold foods (such as dairy products) should be kept cold and hot foods (such as soup) should be kept hot until storage. Cold meats, such as chicken, that are to be cooked should not be placed at room temperature for thawing, at the risk of dangerous bacterial growth, such as ''Salmonella'' or ''Escherichia coli, E. coli''.


Allergies

Some people have allergies or sensitivities to foods that are not problematic to most people. This occurs when a person's immune system mistakes a certain food protein for a harmful foreign agent and attacks it. About 2% of adults and 8% of children have a food allergy.National Institute of Health The amount of the food substance required to provoke a reaction in a particularly susceptible individual can be quite small. In some instances, traces of food in the air, too minute to be perceived through smell, have been known to provoke lethal reactions in extremely sensitive individuals. Common food allergens are gluten,
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corn
, shellfish (mollusks), peanuts, and soy. Allergens frequently produce symptoms such as diarrhea, rashes, bloating, vomiting, and regurgitation (digestion), regurgitation. The digestive complaints usually develop within half an hour of ingesting the allergen. Rarely, food allergies can lead to a medical emergency, such as anaphylactic shock, hypotension (low blood pressure), and loss of consciousness. An allergen associated with this type of reaction is peanut, although latex products can induce similar reactions. Initial treatment is with epinephrine (medication), epinephrine (adrenaline), often carried by known patients in the form of an Epi-pen or Twinject.


Other health issues

Human diet was estimated to cause perhaps around 35% of Diet and cancer, cancers in a human epidemiological analysis by Richard Doll and Richard Peto in 1981. These cancer may be caused by carcinogens that are present in food naturally or as contaminants. Food contaminated with fungal growth may contain mycotoxins such as aflatoxins which may be found in contaminated corn and peanuts. Other carcinogens identified in food include heterocyclic amines generated in meat when cooked at high temperature, polyaromatic hydrocarbons in charred meat and smoked fish, and nitrosamines generated from nitrites used as food preservatives in cured meat such as bacon. Anticarcinogens that may help prevent cancer can also be found in many food especially fruit and vegetables. Antioxidants are important groups of compounds that may help remove potentially harmful chemicals. It is however often difficult to identify the specific components in diet that serve to increase or decrease cancer risk since many food, such as beef steak and broccoli, contain low concentrations of both carcinogens and anticarcinogens. There are many international certifications in the cooking field, such as Monde Selection, A.A. Certification, iTQi. They use high-quality evaluation methods to make the food safer.


Diet


Cultural and religious diets

Many cultures hold some food preferences and some food taboos. Dietary choices can also define cultures and play a role in religion. For example, only Kosher, kosher foods are permitted by Judaism, halal foods by Islam, and in Hinduism beef is restricted. In addition, the dietary choices of different countries or regions have different characteristics. This is highly related to a culture's
cuisine A cuisine is a style of cooking characterized by distinctive ingredients, List of cooking techniques, techniques and dish (food), dishes, and usually associated with a specific culture or geographic region. Regional food preparation traditions ...

cuisine
.


Diet deficiencies

Dietary habits play a significant role in the health and mortality of all humans. Imbalances between the consumed fuels and expended energy results in either starvation or excessive reserves of adipose tissue, known as body fat. Poor intake of various vitamins and minerals can lead to diseases that can have far-reaching effects on health. For instance, 30% of the world's population either has, or is at risk for developing, iodine deficiency. It is estimated that at least 3 million children are blind due to vitamin A deficiency. Vitamin C deficiency results in scurvy. Calcium, Vitamin D, and phosphorus are inter-related; the consumption of each may affect the absorption of the others. Kwashiorkor and marasmus are childhood disorders caused by lack of dietary protein.


Moral, ethical, and health-conscious diets

Many individuals limit what foods they eat for reasons of morality or other habits. For instance, vegetarians choose to forgo food from animal sources to varying degrees. Others choose a Healthy diet, healthier diet, avoiding sugars or animal fats and increasing consumption of dietary fiber and antioxidants. Obesity, a serious problem in the western world, leads to higher chances of developing heart disease, diabetes, cancer and many other diseases. More recently, dietary habits have been influenced by the concerns that some people have about possible impacts on health or the environment from genetically modified food. Further concerns about the impact of industrial farming (Cereal, grains) on animal welfare, human health, and the Ecology, environment are also having an effect on contemporary human dietary habits. This has led to the emergence of a movement with a preference for organic food, organic and local food.Schor


See also

* Bulk foods * Drink, Beverages * ''Food and Bioprocess Technology'' * Food engineering * ''Food, Inc.'', a 2009 documentary * Food science * Future food technology * Industrial crop * List of foods * Lists of prepared foods * Optimal foraging theory * Outline of cooking * Outline of nutrition


References


Sources

* Aguilera, Jose Miguel and David W. Stanley. ''Microstructural Principles of Food Processing and Engineering''. Springer, 1999. . *. * Asado Argentina. ''About Asado Argentina''. Retrieved from http://www.asadoargentina.com/about-asado-argentina/ on 2007-05-28. * Campbell, Bernard Grant. ''Human Evolution: An Introduction to Man's Adaptations''. Aldine Transaction: 1998. . * Carpenter, Ruth Ann; Finley, Carrie E. ''Healthy Eating Every Day''. Human Kinetics, 2005. . * Davidson, Alan. ''The Oxford Companion to Food''. 2nd ed. UK: Oxford University Press, 2006. * Food and Agriculture Organization of the United Nations. ''The State of Food Insecurity in the World 2005''. . Retrieved from http://www.fao.org/docrep/008/a0200e/a0200e00.htm on 2006-09-29. * Hannaford, Steve. ''Oligopoly Watch: Top 20 world food companies''. Retrieved from https://web.archive.org/web/20090918101335/http://www.oligopolywatch.com/2005/10/06.html on 2006-09-23. * Howe, P. and S. Devereux. ''Famine Intensity and Magnitude Scales: A Proposal for an Instrumental Definition of Famine''. 2004. * Humphery, Kim. ''Shelf Life: Supermarkets and the Changing Cultures of Consumption''. Cambridge University Press, 1998. . *. * Jango-Cohen, Judith. ''The History Of Food''. Twenty-First Century Books, 2005. . * Jurgens, Marshall H. ''Animal Feeding and Nutrition''. Kendall Hunt, 2001. . *. * Kripke, Gawain. ''Food aid or hidden dumping?''. Oxfam International, March 2005. Retrieved from https://web.archive.org/web/20060714133231/http://www.oxfam.org/en/policy/briefingpapers/bp71_food_aid_240305 on 2007-05-26. * Lawrie, Stephen; R.A. Lawrie. Lawrie's Meat Science. Woodhead Publishing: 1998. . * Magdoff, Fred; Foster, John Bellamy; and Fred Buttel, Buttel, Frederick H. ''Hungry for Profit: The Agribusiness Threat to Farmers, Food, and the Environment''. September 2000. . * Mason, John. ''Sustainable Agriculture''. Landlinks Press: 2003. . * Merson, Michael H.; Black, Robert E.; Mills, Anne J. ''International Public Health: Disease, Programs, Systems, and Policies''. Jones and Bartlett Publishers, 2005. * McGee, Harold. ''On Food and Cooking: The Science and Lore of the Kitchen''. New York: Simon & Schuster, 2004. . * Mead, Margaret.'' The Changing Significance of Food''. In Carole Counihan and Penny Van Esterik (Ed.), Food and Culture: A Reader. UK: Routledge, 1997. . * Messer, Ellen; Derose, Laurie Fields and Sara Millman. ''Who's Hungry? and How Do We Know?: Food Shortage, Poverty, and Deprivation''. United Nations University Press, 1998. . * National Institute of Health. ''Food poisoning''. MedlinePlus Medical Encyclopedia F. 11 May 2006. Retrieved from https://web.archive.org/web/20060928222906/http://www.niaid.nih.gov/publications/pdf/foodallergy.pdf on 2006-09-29. * Nicklas, Barbara J. ''Endurance Exercise and Adipose Tissue''. CRC Press, 2002. . * Parekh, Sarad R. ''The Gmo Handbook: Genetically Modified Animals, Microbes, and Plants in Biotechnology''. Humana Press,2004. . * Regmi, Anita (editor).''Changing Structure of Global Food Consumption and Trade''. Market and Trade Economics Division, Economic Research Service, USDA, 30 May 2001. stock #ERSWRS01-1. * Schor, Juliet; Taylor, Betsy (editors). ''Sustainable Planet: Roadmaps for the Twenty-First Century''. Beacon Press, 2003. . * Shah, Anup. ''Food Dumping (Aid) Maintains Poverty. Causes of Poverty''. Retrieved from http://www.globalissues.org/TradeRelated/Poverty/FoodDumping.asp on 2006-09-29. * Simoons, Frederick J. ''Eat Not This Flesh: Food Avoidances from Prehistory to the Present''. . * Smith, Andrew (Editor). “Food Marketing,” in Oxford Encyclopedia of American Food and Drink, New York: Oxford University Press, 2007. *. * The Economic Research Service of the USDA. ''Global Food Markets: Briefing Rooms''. Retrieved from https://web.archive.org/web/20170704104430/https://www.ers.usda.gov/topics/international-markets-trade/global-food-markets.aspx on 2006-09-29. * United Kingdom Office of Public Sector Information. ''Food Safety Act 1990 (c. 16)''. Retrieved from http://www.opsi.gov.uk/acts/acts1990/Ukpga_19900016_en_2.htm#mdiv1 on 2006-11-08. *. *. * United States Department of Agriculture, USDA Economic Research Service: The Economics of Food, Farming, Natural Resources, and Rural America. ''"Briefing Rooms, Food CPI, Prices and Expenditures: Food Expenditure Tables"''. Retrieved from http://www.ers.usda.gov/data-products/food-price-outlook.aspx on 2007-06-06. * Van den Bossche, Peter. ''The Law and Policy of the bosanac Trade Organization: Text, Cases and Materials''. UK: Cambridge University Press, 2005. . * World Food Programme. ''Breaking out of the Poverty Trap: How We Use Food Aid''. Retrieved from https://web.archive.org/web/20060928075506/http://www.wfp.org/food_aid/introduction/index.asp?section=12&sub_section=1 on 2006-09-29. * World Health Organization. ''WHO Global Database on Child Growth and Malnutrition''. Retrieved fro

on 2006-09-29. * World Trade Organization. ''The Uruguay Round''. Retrieved from https://web.archive.org/web/20060822200650/http://www.wto.org/trade_resources/history/wto/urug_round.htm on 2006-09-29. *.


Further reading

* Collingham, E.M. (2011). ''The Taste of War: World War Two and the Battle for Food'' * Katz, Solomon (2003). ''The Encyclopedia of Food and Culture'', Scribner * Nestle, Marion (2007). ''Food Politics: How the Food Industry Influences Nutrition and Health'', University Presses of California, revised and expanded edition, * Mobbs, Michael (2012). ''Sustainable Food'' Sydney: NewSouth Publishing,
The Future of Food
(2015). A panel discussion at the 2015 ''Digital Life Design (DLD)'' Annual Conference. "How can we grow and enjoy food, closer to home, further into the future? ''MIT Media Lab’s'' Kevin Slavin hosts a conversation with food artist, educator, and entrepreneur Emilie Baltz, professor Caleb Harper from ''MIT Media Lab's'' CityFarm project, the Barbarian Group's Benjamin Palmer, and Andras Forgacs, the co-founder and CEO of ''Modern Meadow'', who is growing 'victimless' meat in a lab. The discussion addresses issues of sustainable urban farming, ecosystems, technology, food supply chains and their broad environmental and humanitarian implications, and how these changes in food production may change what people may find delicious ... and the other way around." Posted on the official YouTube Channel of ''Digital Life Design, DLD''


External links

* *
Food Timeline

Wikibooks Cookbook

Food
BBC Radio 4 discussion with Rebecca Spang, Ivan Day and Felipe Fernandez-Armesto (''In Our Time'', 27 December 2001) {{Authority control Food and drink, * Foods, Food Watchlist Articles