Dairy products or milk products, also known as lacticinia, are

food products Food is any substance consumed by an organism for nutritional support. Food is usually of plant, animal, or fungal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is inges ...

made from (or containing)

milk Milk is a white liquid food produced by the mammary glands of mammals. It is the primary source of nutrition for young mammals (including breastfed human infants) before they are able to digest solid food. Immune factors and immune-modulatin ...

. The most common dairy animals are

cow Cattle (''Bos taurus'') are large, domesticated, cloven-hooved, herbivores. They are a prominent modern member of the subfamily Bovinae and the most widespread species of the genus '' Bos''. Adult females are referred to as cows and adult ma ...

water buffalo The water buffalo (''Bubalus bubalis''), also called the domestic water buffalo or Asian water buffalo, is a large bovid originating in the Indian subcontinent and Southeast Asia. Today, it is also found in Europe, Australia, North America, So ...

, nanny goat, and ewe. Dairy products include common grocery store food items in the

Western world The Western world, also known as the West, primarily refers to the various nations and states in the regions of Europe, North America, and Oceania.

such as

yogurt Yogurt (; , from tr, yoğurt, also spelled yoghurt, yogourt or yoghourt) is a food produced by bacterial fermentation of milk. The bacteria used to make yogurt are known as ''yogurt cultures''. Fermentation of sugars in the milk by these bact ...

cheese Cheese is a dairy product produced in wide ranges of flavors, textures, and forms by coagulation of the milk protein casein. It comprises proteins and fat from milk, usually the milk of cows, buffalo, goats, or sheep. During production, ...

and

butter Butter is a dairy product made from the fat and protein components of churned cream. It is a semi-solid emulsion at room temperature, consisting of approximately 80% butterfat. It is used at room temperature as a spread, melted as a condiment ...

. A facility that produces dairy products is known as a ''

dairy A dairy is a business enterprise established for the harvesting or processing (or both) of animal milk – mostly from cows or buffaloes, but also from goats, sheep, horses, or camels – for human consumption. A dairy is typically located on a ...

''. Dairy products are consumed worldwide to varying degrees (see consumption patterns worldwide). Some people avoid some or all dairy products either because of

lactose intolerance Lactose intolerance is a common condition caused by a decreased ability to digest lactose, a sugar found in dairy products. Those affected vary in the amount of lactose they can tolerate before symptoms develop. Symptoms may include abdominal p ...

veganism Veganism is the practice of abstaining from the use of animal product—particularly in diet—and an associated philosophy that rejects the commodity status of animals. An individual who follows the diet or philosophy is known as a vegan. D ...

, or other health reasons or beliefs.

Production relationship graph

Types of dairy product

Milk

Milk Milk is a white liquid food produced by the mammary glands of mammals. It is the primary source of nutrition for young mammals (including breastfed human infants) before they are able to digest solid food. Immune factors and immune-modulatin ...

is produced after optional homogenization or

pasteurization Pasteurization or pasteurisation is a process of food preservation in which packaged and non-packaged foods (such as milk and fruit juices) are treated with mild heat, usually to less than , to eliminate pathogens and extend shelf life. Th ...

, in several grades after standardization of the fat level, and possible addition of the bacteria ''

Streptococcus lactis ''Lactococcus lactis'' is a Gram-positive bacterium used extensively in the production of buttermilk and cheese, but has also become famous as the first genetically modified organism to be used alive for the treatment of human disease. ''L. lact ...

'' and ''

Leuconostoc citrovorum ''Leuconostoc'' is a genus of gram-positive bacteria, placed within the family of Lactobacillaceae. They are generally ovoid cocci often forming chains. ''Leuconostoc'' spp. are intrinsically resistant to vancomycin and are catalase-negative (w ...

''. Milk can be broken down into several different categories based on type of product produced, including cream, butter, cheese, infant formula, and yogurt. Milk varies in fat content.

Skim milk Skimmed milk (British English), or skim milk (American English), is made when all the milkfat is removed from whole milk. It tends to contain around 0.1% fat. Background Historically, skimmed milk was used for fattening pigs, and was recommended ...

is milk with zero fat, while

whole milk Milk is a white liquid food produced by the mammary glands of mammals. It is the primary source of nutrition for young mammals (including breastfed human infants) before they are able to digest solid food. Immune factors and immune-modulatin ...

products contain fat. Milk is an ingredient in many confectioneries. Milk can be added to chocolate to produce

milk chocolate Milk chocolate is a solid chocolate confectionery containing cocoa, sugar and milk. Chocolate was originally sold and consumed as a beverage in pre-Columbian times, and upon its introduction to Western Europe. Major milk chocolate producers in ...

Cream

Butter

Butter Butter is a dairy product made from the fat and protein components of churned cream. It is a semi-solid emulsion at room temperature, consisting of approximately 80% butterfat. It is used at room temperature as a spread, melted as a condiment ...

, mostly milk fat, produced by churning cream * ''

Ghee Ghee is a type of clarified butter, originating from India. It is commonly used in India for cooking, as a traditional medicine, and for religious rituals. Description Ghee is typically prepared by simmering butter, which is churned from ...

'' also called, clarified butter, by gentle heating of butter and removal of the solid matter **''

Smen ''Smen'' (from ar, سمن or سمنة also called ''sman'', ''semn'', ''semneh'', or ''sminn'') is a salted, fermented butter, and a traditional Yemeni dish. In Yemen, Yemenis prepare a special version of ''semneh'' (سمنة) which is smoked wi ...

'', a fermented, clarified butter used in Moroccan cooking **

Anhydrous A substance is anhydrous if it contains no water. Many processes in chemistry can be impeded by the presence of water; therefore, it is important that water-free reagents and techniques are used. In practice, however, it is very difficult to achie ...

milkfat (

clarified butter Clarified butter is milk fat rendered from butter to separate the milk solids and water from the butterfat. Typically, it is produced by melting butter and allowing the components to separate by density. The water evaporates, some solids (i.e. w ...

)

Fermented

Fermented milk products Fermented milk products or fermented dairy products, also known as cultured dairy foods, cultured dairy products, or cultured milk products, are dairy foods that have been fermented with lactic acid bacteria such as ''Lactobacillus'', ''Lactococcu ...

include:

Yogurt

Yogurt Yogurt (; , from tr, yoğurt, also spelled yoghurt, yogourt or yoghourt) is a food produced by bacterial fermentation of milk. The bacteria used to make yogurt are known as ''yogurt cultures''. Fermentation of sugars in the milk by these bact ...

, milk fermented by

thermophilic bacteria A thermophile is an organism—a type of extremophile—that thrives at relatively high temperatures, between . Many thermophiles are archaea, though they can be bacteria or fungi. Thermophilic eubacteria are suggested to have been among the ear ...

, mainly ''

Streptococcus ''Streptococcus'' is a genus of gram-positive ' (plural ) or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. Cell division in streptococci occur ...

salivarius'' ssp. ''thermophilus'' and ''Lactobacillus delbrueckii'' ssp. ''bulgaricus'' sometimes with additional bacteria, such as ''

Lactobacillus ''Lactobacillus'' is a genus of Gram-positive, aerotolerant anaerobes or microaerophilic, rod-shaped, non-spore-forming bacteria. Until 2020, the genus ''Lactobacillus'' comprised over 260 phylogenetically, ecologically, and metabolically div ...

acidophilus''

Cheese

Cheese Cheese is a dairy product produced in wide ranges of flavors, textures, and forms by coagulation of the milk protein casein. It comprises proteins and fat from milk, usually the milk of cows, buffalo, goats, or sheep. During production, ...

, produced by coagulating milk, separating

curds Curd is obtained by coagulating milk in a sequential process called curdling. It can be a final dairy product or the first stage in cheesemaking. The coagulation can be caused by adding rennet or any edible acidic substance such as lemo ...

from

whey Whey is the liquid remaining after milk has been curdled and strained. It is a byproduct of the manufacturing of cheese or casein and has several commercial uses. Sweet whey is a byproduct resulting from the manufacture of rennet types of hard c ...

, and letting it ripen, generally with bacteria, and sometimes also with certain

mold A mold () or mould () is one of the structures certain fungi can form. The dust-like, colored appearance of molds is due to the formation of spores containing fungal secondary metabolites. The spores are the dispersal units of the fungi. Not ...

Custard

Custard Custard is a variety of culinary preparations based on sweetened milk, cheese, or cream cooked with egg or egg yolk to thicken it, and sometimes also flour, corn starch, or gelatin. Depending on the recipe, custard may vary in consistency fr ...

, thickened with eggs * Imitation custard, thickened with starch

Frozen

Ice cream Ice cream is a sweetened frozen food typically eaten as a snack or dessert. It may be made from milk or cream and is flavoured with a sweetener, either sugar or an alternative, and a spice, such as cocoa or vanilla, or with fruit such as s ...

, slowly frozen cream, milk, flavors and emulsifying additives (dairy ice cream) *

Gelato Gelato (; ) is the common word in Italian for all kinds of ice cream. In English, it specifically refers to a frozen dessert of Italian origin. Artisanal gelato in Italy generally contains 6%–9% butterfat, which is lower than other styles ...

, slowly frozen milk and water, lesser fat than ice cream *

Ice milk Ice milk, or iced milk, is a frozen dessert with less than 10 percent milk fat and the same sweetener content as ice cream. Ice milk is sometimes priced lower than ice cream. A 1994 change in United States Food and Drug Administration rules allow ...

, low-fat version of ice cream *

Frozen custard Frozen custard is a cold dessert similar to ice cream, but made with eggs in addition to cream and sugar. It is usually kept at a warmer temperature compared to ice cream, and typically has a denser consistency. History Egg yolks have been inte ...

Frozen yogurt Frozen yogurt (also known as frogurt or by the tradename Froyo; ) is a frozen dessert made with yogurt and sometimes other dairy and non-dairy products. Frozen yogurt is a frozen product containing the same basic ingredients as ice cream, but co ...

, yogurt with emulsifiers

Casein

Consumption patterns worldwide

Rates of dairy consumption vary widely worldwide. High-consumption countries consume more than

per capita ''Per capita'' is a Latin phrase literally meaning "by heads" or "for each head", and idiomatically used to mean "per person". The term is used in a wide variety of social sciences and statistical research contexts, including government statistic ...

per year. These countries are: Argentina, Armenia, Australia, Costa Rica, most European countries, Israel, Kyrgyzstan, North America and Pakistan. Medium-consumption countries consume to 150 kg per capita per year. These countries are: India, Iran, Japan, Kenya, Mexico, Mongolia, New Zealand, North and Southern Africa, most of the Middle East, and most of Latin America and the Caribbean. Low-consumption countries consume under 30 kg per capita per year. These countries are: Senegal, most of Central Africa, and most of East and Southeast Asia.

Lactose levels

For those with some degree of

, considering the amount of lactose in dairy products can be important to health.

Intolerance and health research

Dairy products may upset the

digestive system The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue, salivary glands, pancreas, liver, and gallbladder). Digestion involves the breakdown of food into smaller and smaller compon ...

in individuals with

or a

milk allergy Milk allergy is an adverse immune reaction to one or more proteins in cow's milk. Among the possible symptoms is anaphylaxis, a potentially life-threatening condition that requires treatment with epinephrine, among other measures. However, s ...

. People who experience lactose intolerance usually avoid milk and other lactose-containing dairy products, which may cause mild

side effect In medicine, a side effect is an effect, whether therapeutic or adverse, that is secondary to the one intended; although the term is predominantly employed to describe adverse effects, it can also apply to beneficial, but unintended, consequenc ...

s, such as abdominal pain, bloating, diarrhea, gas, and nausea. Such individuals may use non-dairy

milk substitute A milk substitute is any substance that resembles milk and can be used in the same ways as milk. Such substances may be variously known as non-dairy beverage, nut milk, grain milk, legume milk, mock milk and alternative milk. For adults, milk ...

s. Consumption of dairy products does not cause

mucus Mucus ( ) is a slippery aqueous secretion produced by, and covering, mucous membranes. It is typically produced from cells found in mucous glands, although it may also originate from mixed glands, which contain both serous and mucous cells. It is ...

production, and does not worsen

common cold The common cold or the cold is a viral infectious disease of the upper respiratory tract that primarily affects the respiratory mucosa of the nose, throat, sinuses, and larynx. Signs and symptoms may appear fewer than two days after exposur ...

asthma Asthma is a long-term inflammatory disease of the airways of the lungs. It is characterized by variable and recurring symptoms, reversible airflow obstruction, and easily triggered bronchospasms. Symptoms include episodes of wheezing, co ...

symptoms. A 2019 review indicated there is no convincing evidence on whether an association between dairy consumption and risk of cancers exists.

Avoidance on principle

Some groups avoid dairy products for non-health-related reasons. Some religions restrict or do not allow the consumption of dairy products. For example, some scholars of

Jainism Jainism ( ), also known as Jain Dharma, is an Indian religion. Jainism traces its spiritual ideas and history through the succession of twenty-four tirthankaras (supreme preachers of ''Dharma''), with the first in the current time cycle being ...

advocate not consuming any dairy products because dairy is perceived to involve violence against cows. Orthodox

Judaism Judaism ( he, ''Yahăḏūṯ'') is an Abrahamic, monotheistic, and ethnic religion comprising the collective religious, cultural, and legal tradition and civilization of the Jewish people. It has its roots as an organized religion in the ...

requires that meat and dairy products not be served at the same meal, served or cooked in the same utensils, or stored together, as prescribed in Deuteronomy 14:21.

Veganism Veganism is the practice of abstaining from the use of animal product—particularly in diet—and an associated philosophy that rejects the commodity status of animals. An individual who follows the diet or philosophy is known as a vegan. D ...

is the avoidance of all animal products, including dairy products, most often due to the ethics regarding how dairy products are produced. The ethical reasons for avoiding meat and dairy products include how dairy is produced, how the animals are handled, and the environmental effect of dairy production. According to a report of the United Nations'

Food and Agriculture Organization The Food and Agriculture Organization of the United Nations (FAO)french: link=no, Organisation des Nations unies pour l'alimentation et l'agriculture; it, Organizzazione delle Nazioni Unite per l'Alimentazione e l'Agricoltura is an intern ...

in 2010 the dairy sector accounted for 4 percent of global man-made greenhouse gas emissions.