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Powdered milk, also called milk powder, dried milk, or dry milk, is a manufactured dairy product made by evaporating milk to dryness. One purpose of drying milk is to preserve it; milk powder has a far longer
shelf life Shelf life is the length of time that a commodity may be stored without becoming unfit for use, consumption, or sale. In other words, it might refer to whether a commodity should no longer be on a pantry shelf (unfit for use), or no longer on a ...
than liquid milk and does not need to be
refrigerated The term refrigeration refers to the process of removing heat from an enclosed space or substance for the purpose of lowering the temperature.International Dictionary of Refrigeration, http://dictionary.iifiir.org/search.phpASHRAE Terminology, ht ...
, due to its low moisture content. Another purpose is to reduce its bulk for the economy of transportation. Powdered milk and dairy products include such items as dry whole milk, nonfat (skimmed) dry milk, dry
buttermilk Buttermilk is a fermented dairy drink. Traditionally, it was the liquid left behind after churning butter out of cultured cream. As most modern butter in western countries is not made with cultured cream but uncultured sweet cream, most m ...
, dry
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 har ...
products and dry dairy blends. Many exported dairy products conform to standards laid out in '' Codex Alimentarius''. Powdered milk is used for food as an additive, for health (nutrition), and also in
biotechnology Biotechnology is the integration of natural sciences and engineering sciences in order to achieve the application of organisms, cells, parts thereof and molecular analogues for products and services. The term ''biotechnology'' was first used ...
(saturating agent).


History and manufacture

While Marco Polo wrote of Mongolian
Tatar The Tatars ()Tatar
in the Collins English Dictionary
is an umbrella term for different
troops in the time of Kublai Khan who carried sun-dried skimmed milk as "a kind of paste", the first modern production process for dried milk was invented by the Russian doctor Osip Krichevsky in 1802. The first commercial production of dried milk was organized by the Russian chemist M. Dirchoff in 1832. In 1855, T. S. Grimwade took a patent on a dried milk procedure, though a William Newton had patented a vacuum drying process as early as 1837. In modern times, powdered milk is usually made by
spray drying Spray drying is a method of changing a dry powder from a liquid or slurry by rapidly drying with a hot gas. This is the preferred method of drying of many thermally-sensitive materials such as foods and pharmaceuticals, or materials which may requ ...
nonfat
skimmed 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 recommende ...
, whole milk, buttermilk or whey.
Pasteurized Pasteurization American and British English spelling differences#-ise, -ize (-isation, -ization), or pasteurisation is a process of food preservation in which packaged and non-packaged foods (such as milk and fruit juices) are treated with mi ...
milk is first concentrated in an
evaporator An evaporator is a device used to turn the liquid form of a chemical substance, such as water, into a vapor. Uses Air conditioning and refrigeration Some air conditioners and refrigerators use a compressed liquid with a low boiling point, su ...
to approximately 50 percent milk solids. The resulting concentrated milk is then sprayed into a heated chamber where the water almost instantly evaporates, leaving fine particles of powdered milk solids. Alternatively, the milk can be dried by
drum drying Drum drying is a method used for drying out liquids from raw materials with a drying drum. In the drum-drying process, pureed raw ingredients are dried at relatively low temperatures over rotating, high-capacity drums that produce sheets of drum-dr ...
. Milk is applied as a thin film to the surface of a heated drum, and the dried milk solids are then scraped off. However, powdered milk made this way tends to have a cooked flavour, due to
caramelization Caramelization is a process of browning of sugar used extensively in cooking for the resulting sweet nutty flavor and brown color. The brown colors are produced by three groups of polymers: caramelans (C24H36O18), caramelens (C36H50O25), and ca ...
caused by greater heat exposure. Another process is
freeze drying Freeze drying, also known as lyophilization or cryodesiccation, is a low temperature dehydration process that involves freezing the product and lowering pressure, removing the ice by sublimation. This is in contrast to dehydration by most conve ...
, which preserves many nutrients in milk, compared to drum drying. The drying method and the heat treatment of the milk as it is processed alters the properties of the milk powder, such as its solubility in cold water, its flavour, and its
bulk density Bulk density, also called apparent density or volumetric density, is a property of powders, granules, and other "divided" solids, especially used in reference to mineral components (soil, gravel), chemical substances, (pharmaceutical) ingredient ...
.


Food and health uses

Powdered milk is frequently used in the manufacture of
infant formula Infant formula, baby formula, or simply formula (American English); or baby milk, infant milk or first milk (British English), is a manufactured food designed and marketed for feeding to babies and infants under 12 months of age, usually prepar ...
, confectionery such as chocolate and
caramel candy Caramel ( or ) is an orange-brown confectionery product made by heating a range of sugars. It can be used as a flavoring in puddings and desserts, as a filling in bonbons, or as a topping for ice cream and custard. The process of carameli ...
, and in recipes for baked goods where adding liquid milk would render the product too thin. Powdered milk is also widely used in various sweets such as the Indian milk balls known as gulab jamun and a popular Indian sweet delicacy (sprinkled with desiccated coconut) known as chum chum (made with skim milk powder). Many no-cook recipes that use
nut butter A nut butter is a spreadable foodstuff made by grinding nuts into a paste. The result has a high fat content and can be spread like true butter, but is otherwise unrelated. Nut butters include: * Acorn butter * Almond butter * Cashew butter ...
s use powdered milk to prevent the nut butter from turning liquid by absorbing the oil. Powdered milk is also a common item in UN food aid supplies,
fallout shelters A fallout shelter is an enclosed space specially designated to protect occupants from radioactive debris or fallout resulting from a nuclear explosion. Many such shelters were constructed as civil defense measures during the Cold War. Duri ...
, warehouses, and wherever fresh milk is not a viable option. It is widely used in many developing countries because of reduced transport and storage costs (reduced bulk and weight, no refrigerated vehicles). Like other dry foods, it is considered nonperishable and is favored by survivalists,
hikers Hiking is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century.AMATO, JOSEPH A. "Mind over Foot: Romantic Walking and Rambling." In ''On Foot: A Hist ...
, and others requiring nonperishable, easy-to-prepare food. Because of its resemblance to
cocaine Cocaine (from , from , ultimately from Quechuan languages, Quechua: ''kúka'') is a central nervous system (CNS) stimulant mainly recreational drug use, used recreationally for its euphoria, euphoric effects. It is primarily obtained from t ...
and other drugs, powdered milk is sometimes used in filmmaking as a non-toxic
prop A prop, formally known as (theatrical) property, is an object used on stage or screen by actors during a performance or screen production. In practical terms, a prop is considered to be anything movable or portable on a stage or a set, distinc ...
that may be insufflated.


Reconstitution

The weight of nonfat dry milk (NFDM) to use is about 10% of the water weight.Gisslen wrote, "910 g water + 90 g nonfat dry milk" ⟹ 90 g/910 g ≈ 0.0989 = 9.89%. Gisslen also wrote, "14.5 oz water + 1.5 oz nonfat dry milk" ⟹ 1.5 oz/14.5 oz ≈ 0.1034 = 10.34%. There's a value range, depending on weight system used, of 9.89-10.34% NFDM based on water weight when reconstituting nonfat or skim milk. Alternatively, when measuring by volume rather than weight, one cup of fluid milk from powdered milk requires one cup of water and one-third cup of powdered milk.


Nutritional value

Milk powders contain all 21 standard
amino acids Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids, which comprise proteins. Only 22 alpha am ...
, the building blocks of
protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...
s, and are high in soluble
vitamins A vitamin is an organic molecule (or a set of molecules closely related chemically, i.e. vitamers) that is an essential micronutrient that an organism needs in small quantities for the proper functioning of its metabolism. Essential nutrien ...
and
minerals 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 form.John P. Rafferty, ed. (2 ...
. According to USAID, the typical average amounts of major nutrients in the unreconstituted nonfat dry milk are (by weight) 36% protein, 52% carbohydrates (predominantly
lactose Lactose is a disaccharide sugar synthesized by galactose and glucose subunits and has the molecular formula C12H22O11. Lactose makes up around 2–8% of milk (by mass). The name comes from ' (gen. '), the Latin word for milk, plus the suffix '' - ...
), calcium 1.3%, potassium 1.8%. Whole milk powder, on the other hand, contains on average 25–27% protein, 36–38% carbohydrates, 26–40% fat, and 5–7% ash (minerals). In Canada, powdered milk must contain added
vitamin D Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and many other biological effects. In humans, the most important compounds in this group are vitamin D3 (c ...
in an amount such that a reasonable daily intake of the milk will provide between 300 and 400
International unit In pharmacology, the international unit (IU) is a unit of measurement for the effect, not mass of a substance; the variance is based on the biological activity or effect, for the purpose of easier comparison across similar ''forms'' of substance ...
s (IU) of vitamin D. However, inappropriate storage conditions, such as high relative humidity and high ambient temperature, can significantly degrade the nutritive value of milk powder. Commercial milk powders are reported to contain oxysterols (oxidized cholesterol) in higher amounts than in fresh milk (up to 30 μg/g, versus trace amounts in fresh milk).p 296 in "Toxins in Food" by W.M. Dabrowski and Z.E. Sikorski, CRC Press, 2004, Oxysterols are derivatives of cholesterol that are produced either by
free radicals In chemistry, a radical, also known as a free radical, is an atom, molecule, or ion that has at least one unpaired valence electron. With some exceptions, these unpaired electrons make radicals highly chemically reactive. Many radicals spont ...
or by enzymes. Some free radicals-derived oxysterols have been suspected of being initiators of
atherosclerotic plaques Atherosclerosis is a pattern of the disease arteriosclerosis in which the wall of the artery develops abnormalities, called lesions. These lesions may lead to narrowing due to the buildup of atheromatous plaque. At onset there are usually no sy ...
. For comparison,
powdered eggs A powdered egg is a fully dehydrated egg. Most powdered eggs are made using spray drying in the same way that powdered milk is made. The major advantages of powdered eggs over fresh eggs are the reduced weight per volume of whole egg equivalent ...
contain even more oxysterols, up to 200 μg/g.


Export market

As of 2020, the largest producers of milk powder are Europe, New Zealand, China, United States and Brazil. European production of milk powder in fiscal year 2019–2020 was estimated at around 3.0 million tonnes of which the main volume was exported in bulk packing or consumer packs. Australia also has a significant milk powder export industry, exporting over 13,000 tonnes of skim and whole milk powder in fiscal year 2020–2021, to a value of approximately AUD $83 000 000. Brands on the market include Nido, from the company
Nestlé Nestlé S.A. (; ; ) is a Switzerland, Swiss multinational food and drink processing conglomerate corporation headquartered in Vevey, Vaud, Switzerland. It is the largest publicly held food company in the world, measured by revenue and other me ...
, Incolac from the company Milcobel, Dutch Lady from
FrieslandCampina Royal FrieslandCampina N.V. is a Dutch multinational dairy cooperative which is based in Amersfoort, Netherlands. It is the result of a merger between Friesland Foods and Campina on 30 December 2008. The European Commission approved this merger ...
and Puck from
Arla Foods , industry = Dairy , predecessor = ArlaMD Foods , founded = , founder = , location_city = Viby , location_country = Denmark , area_served = Worldwide , key_people = Peder Tub ...
. Some of the largest businesses in the industry are Nestlé, Danone, Lactalis, Fonterra, FrieslandCampina, Dean Foods, Arla Foods, Dairy Farmers of America, Kraft Foods, Saputo, and Parmalat.


Adulteration

In the
2008 Chinese milk scandal The 2008 Chinese milk scandal was a significant Food safety incidents in China, food safety incident in China. The scandal involved Sanlu Group, Sanlu Group's milk and infant formula along with other food materials and components being adultera ...
,
melamine Melamine is an organic compound with the formula C3H6N6. This white solid is a trimer of cyanamide, with a 1,3,5-triazine skeleton. Like cyanamide, it contains 67% nitrogen by mass, and its derivatives have fire retardant properties due t ...
adulterant An adulterant is caused by the act of adulteration, a practice of secretly mixing a substance with another. Typical substances that are adulterated include but are not limited to food, cosmetics, pharmaceuticals, fuel, or other chemicals, that ...
was found in
Sanlu Sanlu Group CO., Ltd. (SJZSGCZ) was a state-owned Chinese dairy products company based in Xinhua District, Shijiazhuang, the capital city of Hebei. It produced one of the oldest and most popular brands of infant formula in China.
infant formula Infant formula, baby formula, or simply formula (American English); or baby milk, infant milk or first milk (British English), is a manufactured food designed and marketed for feeding to babies and infants under 12 months of age, usually prepar ...
, added to fool tests into reporting higher protein content. Thousands became ill, and some children died, after consuming the product.


Contamination scare

In August 2013, China temporarily suspended all milk powder imports from New Zealand, after a scare where
botulism Botulism is a rare and potentially fatal illness caused by a toxin produced by the bacterium ''Clostridium botulinum''. The disease begins with weakness, blurred vision, feeling tired, and trouble speaking. This may then be followed by weaknes ...
-causing bacteria was falsely detected in several batches of New Zealand-produced
whey protein concentrate Whey protein is a mixture of proteins isolated from whey, the liquid material created as a by-product of cheese production. The proteins consist of α-lactalbumin, β-lactoglobulin, serum albumin and immunoglobulins. Glycomacropeptide also make ...
. As a result of the product recall, the New Zealand dollar slipped significantly based on expected losses in sales from this single commodity.


Use in biotechnology

Fat-free powdered milk is used as a saturating agent to block nonspecific binding sites on supports like blotting membranes (
nitrocellulose Nitrocellulose (also known as cellulose nitrate, flash paper, flash cotton, guncotton, pyroxylin and flash string, depending on form) is a highly flammable compound formed by nitrating cellulose through exposure to a mixture of nitric acid and ...
,
polyvinylidene fluoride Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. PVDF is a specialty plastic used in applications requiring the highest pur ...
(PVDF) or nylon), preventing binding of further detection reagents and subsequent background.p 82 in "Lab Ref, Volume 2: A Handbook of Recipes, Reagents, and Other Reference Tools for Use at the Bench" by A.S. Mellick and L. Rodgers, CSHL Press, 2002, It may be referred as Blotto. The major
protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...
of milk,
casein Casein ( , from Latin ''caseus'' "cheese") is a family of related phosphoproteins (CSN1S1, αS1, aS2, CSN2, β, K-casein, κ) that are commonly found in mammalian milk, comprising about 80% of the proteins in cow's milk and between 20% and 60% of ...
, is responsible for most of the binding site saturation effect.


See also

*
Baked milk Baked milk (russian: топлёное молоко, ua, пряжене молоко, be, адтопленае малако) is a variety of boiled milk that has been particularly popular in Russia, Ukraine and Belarus. It is made by simmering mi ...
* Coconut milk powder *
Condensed milk Condensed milk is cow's milk from which water has been removed (roughly 60% of it). It is most often found with sugar added, in the form of ''sweetened condensed milk'' (SCM), to the extent that the terms "condensed milk" and "sweetened condens ...
*
Convenience food Convenience food, also called tertiary processed food, is food that is commercially prepared (often through processing) to optimise ease of consumption. Such food is usually ready to eat without further preparation. It may also be easily por ...
* Creamer *
Evaporated milk Evaporated milk, known in some countries as "unsweetened condensed milk", is a shelf-stable canned cow’s milk product where about 60% of the water has been removed from fresh milk. It differs from sweetened condensed milk, which contains add ...
*
Fat content of milk The fat content of milk is the proportion of milk, by weight, made up by butterfat. The fat content, particularly of cow's milk, is modified to make a variety of products. The fat content of milk is usually stated on the container, and the color ...
*
Food powder Food powder or powdery food is the most common format of dried solid food material that meets specific quality standards, such as moisture content, particle size, and particular morphology. Common powdery food products include milk powder, tea powd ...
*
Instant breakfast Instant breakfast typically refers to breakfast food products that are manufactured in a powdered form, which are generally prepared with the addition of milk and then consumed as a drink.List of dried foods This is a list of dried foods. Food drying is a method of food preservation that works by removing water from the food, which inhibits the growth of bacteria and has been practiced worldwide since ancient times to preserve food. Where or when d ...
* Pomazánkové máslo *
Powdered eggs A powdered egg is a fully dehydrated egg. Most powdered eggs are made using spray drying in the same way that powdered milk is made. The major advantages of powdered eggs over fresh eggs are the reduced weight per volume of whole egg equivalent ...
*
Scalded milk Scalded milk is dairy milk that has been heated to . At this temperature, bacteria are killed, enzymes in the milk are destroyed, and many of the proteins are denatured. Since most milk sold today is pasteurized, which accomplishes the first two g ...
*
Malted milk Malted milk or malt powder is a powdered gruel made from a mixture of malted barley, wheat flour, and evaporated whole milk powder. The powder is used to add its distinctive flavor to beverages and other foods, but it is also used in baking ...


Notes


References


External links

{{DEFAULTSORT:Powdered Milk Instant foods and drinks Dried foods Milk Russian inventions Food powders