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Cheese is a dairy product produced in wide ranges of flavors, textures, and forms by
coagulation Coagulation, also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot. It potentially results in hemostasis, the cessation of blood loss from a damaged vessel, followed by repair. The mechanism ...
of the milk protein
casein Casein ( , from Latin ''caseus'' "cheese") is a family of related phosphoproteins ( αS1, aS2, β, κ) that are commonly found in mammalian milk, comprising about 80% of the proteins in cow's milk and between 20% and 60% of the proteins in human ...
. It comprises proteins and fat from milk, usually the milk of
cows 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 ...
, buffalo, goats, or sheep. During production, milk is usually
acid In computer science, ACID ( atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. In the context of databases, a sequ ...
ified and the enzymes of either
rennet Rennet () is a complex set of enzymes produced in the stomachs of ruminant mammals. Chymosin, its key component, is a protease enzyme that curdles the casein in milk. In addition to chymosin, rennet contains other enzymes, such as pepsin and ...
or bacterial enzymes with similar activity are added to cause the casein to coagulate. The solid
curd 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 lemon ...
s are then separated from the liquid whey and pressed into finished cheese. Some cheeses have aromatic molds on the rind, the outer layer, or throughout. Over a thousand types of cheese exist and are produced in various countries. Their styles, textures and flavors depend on the origin of the milk (including the animal's diet), whether they have been
pasteurized 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. T ...
, the
butterfat Butterfat or milkfat is the fatty portion of milk. Milk and cream are often sold according to the amount of butterfat they contain. Composition Butterfat is mainly composed of triglycerides. Each triglyceride contains three fatty acids. Butt ...
content, the bacteria and mold, the processing, and how long they have been
aged Ageing ( BE) or aging ( AE) is the process of becoming older. The term refers mainly to humans, many other animals, and fungi, whereas for example, bacteria, perennial plants and some simple animals are potentially biologically immortal. In ...
. Herbs, spices, or
wood smoke Smoke is a suspension of airborne particulates and gases emitted when a material undergoes combustion or pyrolysis, together with the quantity of air that is entrained or otherwise mixed into the mass. It is commonly an unwanted by-produc ...
may be used as
flavoring agent A flavoring (or flavouring), also known as flavor (or flavour) or flavorant, is a food additive used to improve the taste or smell of food. It changes the perceptual impression of food as determined primarily by the chemoreceptors of the gustat ...
s. The yellow to red color of many cheeses is produced by adding
annatto Annatto ( or ) is an orange-red condiment and food coloring derived from the seeds of the achiote tree ('' Bixa orellana''), native to tropical America. It is often used to impart a yellow or orange color to foods, but sometimes also for its f ...
. Other ingredients may be added to some cheeses, such as
black pepper Black pepper (''Piper nigrum'') is a flowering vine in the family Piperaceae, cultivated for its fruit, known as a peppercorn, which is usually dried and used as a spice and seasoning. The fruit is a drupe (stonefruit) which is about in diame ...
, garlic,
chives Chives, scientific name ''Allium schoenoprasum'', is a species of flowering plant in the family Amaryllidaceae that produces edible leaves and flowers. Their close relatives include the common onions, garlic, shallot, leek, scallion, and ...
, or
cranberries Cranberries are a group of evergreen dwarf shrubs or trailing vines in the subgenus ''Oxycoccus'' of the genus ''Vaccinium''. In Britain, cranberry may refer to the native species ''Vaccinium oxycoccos'', while in North America, cranberry m ...
. A cheesemonger, or specialist seller of cheeses, may have expertise with selecting the cheeses, purchasing, receiving, storing and ripening them. For a few cheeses, the milk is
curd 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 lemon ...
led by adding
acid In computer science, ACID ( atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. In the context of databases, a sequ ...
s such as vinegar or lemon juice. Most cheeses are acidified to a lesser degree by bacteria, which turn
milk sugar 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 ''-o ...
s into lactic acid, then the addition of rennet completes the curdling. Vegetarian alternatives to rennet are available; most are produced by fermentation of the fungus ''
Mucor miehei ''Rhizomucor miehei'' (also: ''Mucor miehei'' ) is a species of fungus. It is commercially used to produce enzymes which can be used to produce a microbial rennet to curd milk and produce cheese. Under experimental conditions, this species grow ...
'', but others have been extracted from various species of the ''
Cynara ''Cynara'' is a genus of thistle-like perennial plants in the family Asteraceae. They are native to the Mediterranean region, the Middle East, northwestern Africa, and the Canary Islands. The genus name comes from the Greek ''kynara'', which mea ...
'' thistle family.
Cheesemaker Cheesemaking (or caseiculture) is the craft of making cheese. The production of cheese, like many other food preservation processes, allows the nutritional and economic value of a food material, in this case milk, to be preserved in concentrat ...
s near a dairy region may benefit from fresher, lower-priced milk, and lower shipping costs. Cheese is valued for its portability, long shelf life, and high content of fat, protein,
calcium Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar ...
, and phosphorus. Cheese is more compact and has a longer shelf life than milk, although how long a cheese will keep depends on the type of cheese.
Hard cheese There are many different types of cheese. Cheeses can be grouped or classified according to criteria such as length of fermentation, texture, methods of production, fat content, animal milk, and country or region of origin. The method most com ...
s, such as
Parmesan Parmesan ( it, Parmigiano Reggiano; ) is an Italian hard, granular cheese produced from cows’ milk and aged at least 12 months. It is named after two of the areas which produce it, the provinces of Parma and Reggio Emilia (''Parmigiano'' is ...
, last longer than soft cheeses, such as
Brie Brie (; ) is a soft cow's-milk cheese named after Brie, the French region from which it originated (roughly corresponding to the modern ''département'' of Seine-et-Marne). It is pale in color with a slight grayish tinge under a rind of white m ...
or
goat's milk cheese Goat cheese, or chèvre ( or ; from French ''fromage de chèvre'' 'goat cheese'), is cheese made from goat's milk. Goats were among the first animals to be domesticated for producing food. Goat cheese is made around the world with a variety of ...
. The long storage life of some cheeses, especially when encased in a protective rind, allows selling when markets are favorable. Vacuum packaging of block-shaped cheeses and gas-flushing of plastic bags with mixtures of carbon dioxide and nitrogen are used for storage and mass distribution of cheeses in the 21st century. Plant-based cheese has a lower
carbon footprint A carbon footprint is the total greenhouse gas (GHG) emissions caused by an individual, event, organization, service, place or product, expressed as carbon dioxide equivalent (CO2e). Greenhouse gases, including the carbon-containing gases carb ...
.


Etymology

The word ''cheese'' comes from Latin ', from which the modern word
casein Casein ( , from Latin ''caseus'' "cheese") is a family of related phosphoproteins ( αS1, aS2, β, κ) that are commonly found in mammalian milk, comprising about 80% of the proteins in cow's milk and between 20% and 60% of the proteins in human ...
is also derived. The earliest source is from the proto-Indo-European root ''*kwat-'', which means "to
ferment Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes. In biochemistry, it is narrowly defined as the extraction of energy from carbohydrates in the absence of oxygen. In food p ...
, become sour". That gave rise to ' or ' (in Old English) and ' (in Middle English). Similar words are shared by other
West Germanic languages The West Germanic languages constitute the largest of the three branches of the Germanic family of languages (the others being the North Germanic and the extinct East Germanic languages). The West Germanic branch is classically subdivided into t ...
West Frisian ', Dutch ', German ', Old High German '—all from the reconstructed West-Germanic form ''*kāsī'', which in turn is an early borrowing from Latin. The '' Online Etymological Dictionary'' states that "cheese" comes from "Old English cyse (West Saxon), cese (Anglian)...from West Germanic *kasjus (source also of Old Saxon kasi, Old High German chasi, German Käse, Middle Dutch case, Dutch kaas), from Latin caseus or"cheese" (source of Italian cacio, Spanish queso, Irish caise, Welsh caws)." The ''Online Etymological Dictionary'' states that the word is of "unknown origin; perhaps from a PIE root *kwat- "to ferment, become sour" (source also of Prakrit chasi "buttermilk;" Old Church Slavonic kvasu "leaven;
fermented drink This is a list of fermented foods, which are foods produced or preserved by the action of microorganisms. In this context, Fermentation in food processing, fermentation typically refers to the fermentation of sugar to ethanol, alcohol using yeas ...
," kyselu "sour," -kyseti "to turn sour;" Czech kysati "to turn sour, rot;" Sanskrit kvathati "boils, seethes;" Gothic hwaþjan "foam"). Also compare fromage. Old Norse , Danish , Swedish are related to Latin "broth, sauce, juice.'" When the Romans began to make hard cheeses for their legionaries' supplies, a new word started to be used: ', from ', or "molded cheese" (as in "formed", not "moldy"). It is from this word that the French ', standard Italian ',
Catalan Catalan may refer to: Catalonia From, or related to Catalonia: * Catalan language, a Romance language * Catalans, an ethnic group formed by the people from, or with origins in, Northern or southern Catalonia Places * 13178 Catalan, asteroid #1 ...
', Breton ', and Occitan ' (or ') are derived. Of the Romance languages, Spanish,
Portuguese Portuguese may refer to: * anything of, from, or related to the country and nation of Portugal ** Portuguese cuisine, traditional foods ** Portuguese language, a Romance language *** Portuguese dialects, variants of the Portuguese language ** Portu ...
,
Romanian Romanian may refer to: *anything of, from, or related to the country and nation of Romania ** Romanians, an ethnic group **Romanian language, a Romance language ***Romanian dialects, variants of the Romanian language **Romanian cuisine, traditiona ...
, Tuscan and Southern Italian dialects use words derived from ' (', ', ' and ' for example). The word ''cheese'' itself is occasionally employed in a sense that means "molded" or "formed". ''
Head cheese Head cheese ( Dutch: ''hoofdkaas'') or brawn is a cold cut terrine or meat jelly that originated in Europe. It is made with flesh from the head of a calf or pig (less commonly a sheep or cow), typically set in aspic, and usually eaten cold, ...
'' uses the word in this sense. The term "cheese" is also used as a noun, verb and adjective in a number of figurative expressions (e.g., "the big cheese", "to be cheesed off" and "cheesy lyrics").


History


Origins

Cheese is an ancient food whose origins predate recorded history. There is no conclusive evidence indicating where cheesemaking originated, whether in Europe, Central Asia or the Middle East. Earliest proposed dates for the origin of cheesemaking range from around 8000 BCE, when sheep were first domesticated. Since animal skins and inflated internal organs have, since ancient times, provided storage vessels for a range of foodstuffs, it is probable that the process of cheese making was discovered accidentally by storing milk in a container made from the stomach of an animal, resulting in the milk being turned to
curd 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 lemon ...
and whey by the rennet from the stomach. There is a legend—with variations—about the discovery of cheese by an Arab trader who used this method of storing milk. The earliest evidence of cheesemaking in the archaeological record dates back to 5500 BCE and is found in what is now Kuyavia, Poland, where strainers coated with milk-fat molecules have been found. Cheesemaking may have begun independently of this by the pressing and salting of curdled milk to preserve it. Observation that the effect of making cheese in an animal stomach gave more solid and better-textured curds may have led to the deliberate addition of rennet. Early
archeological Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscapes ...
evidence of
Egyptian cheese Egyptian cheese ( arz, جبنة '  ) has a long history, and continues to be an important part of the Egyptian diet. There is evidence of cheese-making over 5,000 years ago in the time of the First Dynasty of Egypt. In the Middle Ages the c ...
has been found in Egyptian tomb murals, dating to about 2000 BCE. A 2018 scientific paper stated that the world's oldest cheese, dating to approximately 1200 BCE (3200 years before present), was found in ancient Egyptian tombs. The earliest cheeses were likely quite sour and salty, similar in texture to rustic
cottage cheese Cottage cheese is a curdled milk product with a mild flavor and a creamy, non-homogeneous, soupy texture. It is made from skimmed milk by draining the cheese, as opposed to pressing it to make cheese curd—retaining some of the whey and keeping t ...
or
feta Feta ( el, φέτα, ) is a Greek brined white cheese made from sheep's milk or from a mixture of sheep and goat's milk. It is soft, with small or no holes, a compact touch, few cuts, and no skin. Crumbly with a slightly grainy texture, it ...
, a crumbly, flavorful Greek cheese. Cheese produced in Europe, where climates are cooler than the Middle East, required less salt for preservation. With less salt and acidity, the cheese became a suitable environment for useful
microbe A microorganism, or microbe,, ''mikros'', "small") and ''organism'' from the el, ὀργανισμός, ''organismós'', "organism"). It is usually written as a single word but is sometimes hyphenated (''micro-organism''), especially in olde ...
s and molds, giving aged cheeses their respective flavors. The earliest ever discovered preserved cheese was found in the Taklamakan Desert in Xinjiang, China, dating back as early as 1615 BCE (3600 years before present).


Ancient Greece and Rome

Ancient Greek mythology credited
Aristaeus A minor god in Greek mythology, attested mainly by Athenian writers, Aristaeus (; ''Aristaios'' (Aristaîos); lit. “Most Excellent, Most Useful”), was the culture hero credited with the discovery of many useful arts, including bee-keeping ...
with the discovery of cheese. Homer's '' Odyssey'' (8th century BCE) describes the Cyclops making and storing sheep's and goats' milk cheese (translation by Samuel Butler):
Columella Lucius Junius Moderatus Columella (; Arabic: , 4 – ) was a prominent writer on agriculture in the Roman Empire. His ' in twelve volumes has been completely preserved and forms an important source on Roman agriculture, together with the wo ...
's ''De Re Rustica'' (c. 65 CE) details a cheesemaking process involving rennet coagulation, pressing of the curd, salting, and aging. According to Pliny the Elder, it had become a sophisticated enterprise by the time the
Roman Empire The Roman Empire ( la, Imperium Romanum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was the post-Roman Republic, Republican period of ancient Rome. As a polity, it included large territorial holdings aro ...
came into being. Cheese was an everyday food and cheesemaking a mature art in the Roman empire. Pliny's ''Natural History'' (77 CE) devotes a chapter (XI, 97) to describing the diversity of cheeses enjoyed by Romans of the early Empire. He stated that the best cheeses came from the villages near Nîmes, but did not keep long and had to be eaten fresh. Cheeses of the
Alps The Alps () ; german: Alpen ; it, Alpi ; rm, Alps ; sl, Alpe . are the highest and most extensive mountain range system that lies entirely in Europe, stretching approximately across seven Alpine countries (from west to east): France, Sw ...
and
Apennines The Apennines or Apennine Mountains (; grc-gre, links=no, Ἀπέννινα ὄρη or Ἀπέννινον ὄρος; la, Appenninus or  – a singular with plural meaning;''Apenninus'' (Greek or ) has the form of an adjective, which wou ...
were as remarkable for their variety then as now. A Ligurian cheese was noted for being made mostly from sheep's milk, and some cheeses produced nearby were stated to weigh as much as a thousand pounds each. Goats' milk cheese was a recent taste in Rome, improved over the "medicinal taste" of Gaul's similar cheeses by smoking. Of cheeses from overseas, Pliny preferred those of
Bithynia Bithynia (; Koine Greek: , ''Bithynía'') was an ancient region, kingdom and Roman province in the northwest of Asia Minor (present-day Turkey), adjoining the Sea of Marmara, the Bosporus, and the Black Sea. It bordered Mysia to the southwest, ...
in Asia Minor.


Post-Roman Europe

As Romanized populations encountered unfamiliar newly settled neighbors, bringing their own cheese-making traditions, their own flocks and their own unrelated words for ''cheese'', cheeses in Europe diversified further, with various locales developing their own distinctive traditions and products. As long-distance trade collapsed, only travelers would encounter unfamiliar cheeses:
Charlemagne Charlemagne ( , ) or Charles the Great ( la, Carolus Magnus; german: Karl der Große; 2 April 747 – 28 January 814), a member of the Carolingian dynasty, was King of the Franks from 768, King of the Lombards from 774, and the first Em ...
's first encounter with a white cheese that had an edible rind forms one of the constructed anecdotes of Notker's ''Life'' of the Emperor. The British Cheese Board claims that Britain has approximately 700 distinct local cheeses; France and Italy have perhaps 400 each. (A French proverb holds there is a different French cheese for every day of the year, and
Charles de Gaulle Charles André Joseph Marie de Gaulle (; ; (commonly abbreviated as CDG) 22 November 18909 November 1970) was a French army officer and statesman who led Free France against Nazi Germany in World War II and chaired the Provisional Government ...
once asked "how can you govern a country in which there are 246 kinds of cheese?") Still, the advancement of the cheese art in Europe was slow during the centuries after Rome's fall. Many cheeses popular today were first recorded in the late Middle Ages or after—cheeses like Cheddar around 1500,
Parmesan Parmesan ( it, Parmigiano Reggiano; ) is an Italian hard, granular cheese produced from cows’ milk and aged at least 12 months. It is named after two of the areas which produce it, the provinces of Parma and Reggio Emilia (''Parmigiano'' is ...
in 1597, Gouda in 1697, and
Camembert Camembert (, also , ) is a moist, soft, creamy, surface-ripened cow's milk cheese. It was first made in the late 18th century in Camembert, Normandy, in northwest France. It is sometimes compared in look and taste to brie cheese, albeit wi ...
in 1791. In 1546, ''
The Proverbs of John Heywood John Heywood (c. 1497 – c. 1580) was an English writer known for his plays, poems, and collection of proverbs. Although he is best known as a playwright, he was also active as a musician and composer, though no musical works survive. A devou ...
'' claimed " the moon is made of a green cheese." (''Greene'' may refer here not to the color, as many now think, but to being new or unaged.) Variations on this sentiment were long repeated and NASA exploited this myth for an
April Fools' Day April Fools' Day or All Fools' Day is an annual custom on 1 April consisting of practical jokes and hoaxes. Jokesters often expose their actions by shouting "April Fools!" at the recipient. Mass media can be involved in these pranks, which may ...
spoof announcement in 2006.


Modern era

Until its modern spread along with European culture, cheese was nearly unheard of in east Asian cultures and in the pre-Columbian Americas and had only limited use in sub-Mediterranean Africa, mainly being widespread and popular only in Europe, the Middle East, the Indian subcontinent, and areas influenced by those cultures. But with the spread, first of European imperialism, and later of Euro-American culture and food, cheese has gradually become known and increasingly popular worldwide. The first factory for the industrial production of cheese opened in Switzerland in 1815, but large-scale production first found real success in the United States. Credit usually goes to Jesse Williams, a dairy farmer from Rome, New York, who in 1851 started making cheese in an assembly-line fashion using the milk from neighboring farms; this made cheddar cheese one of the first US industrial foods. Within decades, hundreds of such commercial dairy associations existed. The 1860s saw the beginnings of mass-produced rennet, and by the turn of the century scientists were producing pure microbial cultures. Before then, bacteria in cheesemaking had come from the environment or from recycling an earlier batch's whey; the pure cultures meant a more standardized cheese could be produced. Factory-made cheese overtook traditional cheesemaking in the World War II era, and factories have been the source of most cheese in America and Europe ever since. By 2012, cheese was one of the most
shoplifted Shoplifting is the theft of goods from an open retail establishment, typically by concealing a store item on one's person, in pockets, under clothes or in a bag, and leaving the store without paying. With clothing, shoplifters may put on ite ...
items from supermarkets worldwide.


Production

In 2014, world production of cheese from whole cow milk was 18.7 million tonnes, with the United States accounting for 29% (5.4 million tonnes) of the world total followed by Germany, France and Italy as major producers (table). Other 2014 world totals for processed cheese include: * from skimmed cow milk, 2.4 million tonnes (leading country, Germany, 845,500 tonnes) * from goat milk, 523,040 tonnes (leading country, South Sudan, 110,750 tonnes) * from sheep milk, 680,302 tonnes (leading country, Greece, 125,000 tonnes) * from buffalo milk, 282,127 tonnes (leading country, Egypt, 254,000 tonnes) During 2015, Germany, France, Netherlands and Italy exported 10–14% of their produced cheese. The United States was a marginal exporter (5.3% of total cow milk production), as most of its output was for the domestic market. The
carbon footprint A carbon footprint is the total greenhouse gas (GHG) emissions caused by an individual, event, organization, service, place or product, expressed as carbon dioxide equivalent (CO2e). Greenhouse gases, including the carbon-containing gases carb ...
of a kilogram of cheese ranges from 6 to 12kg of CO2eq, depending on the amount of milk used; thus it is generally lower than beef or lamb but higher than other foods.


Consumption

France, Iceland, Finland, Denmark and Germany were the highest consumers of cheese in 2014, averaging per person per annum.


Processing


Curdling

A required step in cheesemaking is separating the milk into solid
curd 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 lemon ...
s and liquid whey. Usually this is done by acidifying (
souring Souring is a food preparation technique that causes a physical and chemical change in food by exposing it to an acid. This acid can be added explicitly (e.g., vinegar, lemon juice, lime juice, etc.), or can be produced within the food itself by a ...
) the milk and adding
rennet Rennet () is a complex set of enzymes produced in the stomachs of ruminant mammals. Chymosin, its key component, is a protease enzyme that curdles the casein in milk. In addition to chymosin, rennet contains other enzymes, such as pepsin and ...
. The acidification can be accomplished directly by the addition of an acid, such as vinegar, in a few cases (
paneer Paneer (), also known as ponir () is a fresh acid-set cheese common in the Indian subcontinent (Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan and Sri Lanka) made from full-fat buffalo milk or cow milk. It is a non-aged, non-melting soft ...
, queso fresco). More commonly starter bacteria are employed instead which convert milk sugars into lactic acid. The same bacteria (and the enzymes they produce) also play a large role in the eventual flavor of aged cheeses. Most cheeses are made with starter bacteria from the '' Lactococcus'', ''
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 ...
'', or '' Streptococcus'' genera. Swiss starter cultures also include '' Propionibacter shermani'', which produces carbon dioxide gas bubbles during aging, giving Swiss cheese or
Emmental The Emmental ( en, Emme Valley) is a valley in west-central Switzerland, forming part of the canton of Bern. It is a hilly landscape comprising the basins of the rivers Emme and Ilfis. The region is mostly devoted to farming, particularly dair ...
its holes (called " eyes"). Some fresh cheeses are curdled only by acidity, but most cheeses also use rennet. Rennet sets the cheese into a strong and rubbery gel compared to the fragile curds produced by acidic coagulation alone. It also allows curdling at a lower acidity—important because flavor-making bacteria are inhibited in high-acidity environments. In general, softer, smaller, fresher cheeses are curdled with a greater proportion of acid to rennet than harder, larger, longer-aged varieties. While rennet was traditionally produced via extraction from the inner mucosa of the fourth stomach chamber of slaughtered young, unweaned calves, most rennet used today in cheesemaking is produced recombinantly. The majority of the applied chymosin is retained in the whey and, at most, may be present in cheese in trace quantities. In ripe cheese, the type and provenance of chymosin used in production cannot be determined.


Curd processing

At this point, the cheese has set into a very moist gel. Some soft cheeses are now essentially complete: they are drained, salted, and packaged. For most of the rest, the curd is cut into small cubes. This allows water to drain from the individual pieces of curd. Some hard cheeses are then heated to temperatures in the range of . This forces more whey from the cut curd. It also changes the taste of the finished cheese, affecting both the bacterial culture and the milk chemistry. Cheeses that are heated to the higher temperatures are usually made with
thermophilic 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 ea ...
starter bacteria that survive this step—either ''
Lactobacilli The ''Lactobacillaceae'' are a family of lactic acid bacteria. It is the only family in the lactic acid bacteria which includes homofermentative and heterofermentative organisms; in the ''Lactobacillaceae,'' the pathway used for hexose fermentati ...
'' or ''
Streptococci ''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 occu ...
''. Salt has roles in cheese besides adding a salty flavor. It preserves cheese from spoiling, draws moisture from the curd, and firms cheese's texture in an interaction with its proteins. Some cheeses are salted from the outside with dry salt or brine washes. Most cheeses have the salt mixed directly into the curds. Other techniques influence a cheese's texture and flavor. Some examples are : * Stretching: (
Mozzarella Mozzarella (, ; nap, muzzarella ) is a southern Italian cheese traditionally made from Italian buffalo's milk by the pasta filata method. Fresh mozzarella is generally white but when seasoned it turns to a light yellow depending on the anim ...
,
Provolone Provolone (, ) is an Italian cheese. It is an aged ''pasta filata'' (stretched-curd) cheese originating in Campania near Vesuvius, where it is still produced in pear, sausage, or cone shapes long. Provolone-type cheeses are also produced in othe ...
) The curd is stretched and kneaded in hot water, developing a stringy, fibrous body. *
Cheddaring The manufacture of Cheddar cheese includes the process of ''cheddaring'', which makes this cheese unique. Cheddar cheese is named for the village of Cheddar in Somerset in South West England where it was originally manufactured. The manufacturi ...
: ( Cheddar, other English cheeses) The cut curd is repeatedly piled up, pushing more moisture away. The curd is also mixed (or ''milled'') for a long time, taking the sharp edges off the cut curd pieces and influencing the final product's texture. * Washing: ( Edam, Gouda, Colby) The curd is washed in warm water, lowering its acidity and making for a milder-tasting cheese. Most cheeses achieve their final shape when the curds are pressed into a mold or form. The harder the cheese, the more pressure is applied. The pressure drives out moisture—the molds are designed to allow water to escape—and unifies the curds into a single solid body.


Ripening

A newborn cheese is usually salty yet bland in flavor and, for harder varieties, rubbery in texture. These qualities are sometimes enjoyed—
cheese curds Cheese curds are moist pieces of curdled milk, eaten either alone or as a snack, or used in prepared dishes. They are consumed throughout the northern United States and Canada. Notably, cheese curds are popular in Quebec, as part of the dish po ...
are eaten on their own—but normally cheeses are left to rest under controlled conditions. This aging period (also called ripening, or, from the French, ''affinage'') lasts from a few days to several years. As a cheese ages, microbes and enzymes transform texture and intensify flavor. This transformation is largely a result of the breakdown of casein proteins and milkfat into a complex mix of
amino acid 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 ...
s,
amine In chemistry, amines (, ) are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (), wherein one or more hydrogen atoms have been replaced by a substituent suc ...
s, and fatty acids. Some cheeses have additional bacteria or molds intentionally introduced before or during aging. In traditional cheesemaking, these microbes might be already present in the aging room; they are allowed to settle and grow on the stored cheeses. More often today, prepared cultures are used, giving more consistent results and putting fewer constraints on the environment where the cheese ages. These cheeses include soft ripened cheeses such as
Brie Brie (; ) is a soft cow's-milk cheese named after Brie, the French region from which it originated (roughly corresponding to the modern ''département'' of Seine-et-Marne). It is pale in color with a slight grayish tinge under a rind of white m ...
and
Camembert Camembert (, also , ) is a moist, soft, creamy, surface-ripened cow's milk cheese. It was first made in the late 18th century in Camembert, Normandy, in northwest France. It is sometimes compared in look and taste to brie cheese, albeit wi ...
, blue cheeses such as
Roquefort Roquefort is a sheep milk cheese from Southern France, and is one of the world's best known blue cheeses. Though similar cheeses are produced elsewhere, EU law dictates that only those cheeses aged in the natural Combalou caves of Roquefort-sur ...
,
Stilton Stilton is a village and civil parish in Cambridgeshire, England, about north of Huntingdon in Huntingdonshire, which is a non-metropolitan district of Cambridgeshire as well as a historic county of England. History There is evidence of Neo ...
,
Gorgonzola Gorgonzola (; ) is a veined blue cheese, originally from Italy, made from unskimmed cow's milk. It can be buttery or firm, crumbly and quite salty, with a "bite" from its blue veining. History Historically, gorgonzola has been produced for ...
, and
rind-washed cheese There are many different types of cheese. Cheeses can be grouped or classified according to criteria such as length of fermentation, texture, methods of production, fat content, animal milk, and country or region of origin. The method most comm ...
s such as
Limburger Limburger (in southern Dutch contexts Rommedoe, and in Belgium Herve cheese) is a cheese that originated in the Herve area of the historical Duchy of Limburg, which had its capital in Limbourg-sur-Vesdre, now in the French-speaking Belgian pr ...
.


Types

There are many types of cheese, with around 500 different varieties recognized by the International Dairy Federation, more than 400 identified by Walter and Hargrove, more than 500 by Burkhalter, and more than 1,000 by Sandine and Elliker. The varieties may be grouped or classified into types according to criteria such as length of ageing, texture, methods of making, fat content, animal milk, country or region of origin, etc.—with these criteria either being used singly or in combination, but with no single method being universally used. The method most commonly and traditionally used is based on moisture content, which is then further discriminated by fat content and curing or ripening methods. Some attempts have been made to rationalise the classification of cheese—a scheme was proposed by Pieter Walstra which uses the primary and secondary starter combined with moisture content, and Walter and Hargrove suggested classifying by production methods which produces 18 types, which are then further grouped by moisture content. File:Wikicheese - Brie de Melun - 20150515 - 015.jpg,
Brie Brie (; ) is a soft cow's-milk cheese named after Brie, the French region from which it originated (roughly corresponding to the modern ''département'' of Seine-et-Marne). It is pale in color with a slight grayish tinge under a rind of white m ...
cheese File:Bleu de Gex.jpg,
Bleu de Gex ''Bleu de Gex'' (also ''Bleu du Haut-Jura'' or ''Bleu de Septmoncel'') is a creamy, semi-soft blue cheese made from unpasteurized milk in the Jura region of France. It is named after the Pays de Gex, a historical region in what is now France ...
File:Maccagno (cheese).jpg,
Maccagno Maccagno was a ''comune'' (municipality) of 2,000 inhabitants located in the province of Varese in the Italian region Lombardy, located in the Val Veddasca about 70 km northwest of Milan and about 25 km northwest of Varese. On 1 Januar ...
cheese File:Berkswell cheese.jpg, Berkswell Cheese File:Maroilles (cheese).jpg,
Maroilles cheese Maroilles (; also known as Marolles, or simply known as Maroilles) is a cow's-milk cheese made in the regions of Picardy and Nord-Pas-de-Calais in northern France. It derives its name from the village of Maroilles in the region in which it is st ...
File:Mozzarella cheese.jpg,
Mozzarella Mozzarella (, ; nap, muzzarella ) is a southern Italian cheese traditionally made from Italian buffalo's milk by the pasta filata method. Fresh mozzarella is generally white but when seasoned it turns to a light yellow depending on the anim ...
File:Queso fresco.JPG, Queso fresco File:Smoked Gruyère cheese.jpg,
Smoked cheese Smoked cheese is any cheese that has been specially treated by smoke-curing. It typically has a yellowish-brown outer pellicle which is a result of this curing process. Process Smoke-curing is typically done in one of two ways: cold-smoking and ...
File:Bergader Almkäse Chili 01 WikiCheese Lokal K.jpg, Bergader Almkase cheese File:00928 Beskider Käse aus Schafsmilch 2013; Sheep's-milk cheeses from Poland; Northern Subcarpathians.JPG, Sheep milk cheese from Poland File:Cœurs de Neufchâtel 01.jpg, Cœur de Neufchâtel File:Cowgirl Creamery Point Reyes - Devil’s Gulch cheese.jpg, Devil's Gulch cheese File:Camembert (Cheese).jpg,
Camembert Camembert (, also , ) is a moist, soft, creamy, surface-ripened cow's milk cheese. It was first made in the late 18th century in Camembert, Normandy, in northwest France. It is sometimes compared in look and taste to brie cheese, albeit wi ...
File:WikiCheese - Saint-Julien aux noix 01.jpg, Saint-Julien aux noix File:Bavaria blu 03 WikiCheese Lokal K.jpg, Bavaria blu cheese File:SmallEdamCheese.jpg, Edam File:Sainte-Maure de touraine 03.jpg,
Sainte-Maure de Touraine Sainte-Maure de Touraine is a French cheese produced in the province of Touraine, mainly in the department of Indre-et-Loire. It is named after the small town of Sainte-Maure-de-Touraine, in the department of Indre-et-Loire, at equal distance fr ...
File:WikiCheese - Tentation du Vercors - 20150619 - 001.jpg, Tentation du Vercors File:Bleu d'Élizabeth.jpg, Bleu d'Élizabeth File:Météorite fromage.jpg, Météorite fromage File:Ricotta salata e zucchina.jpg, Ricotta File:WikiCheese - Rigotte de Condrieu - 20150619 - 001.jpg, Rigotte de Condrieu File:Parmigiano Reggiano DOP Billa.jpg, Parmigiano-Reggiano File:Chabichou du Poitou 01.jpg, Chabichou du Poitou File:Grünschimmelkäse Österkron.jpg, Österkron blue cheese File:Reblochon 01.jpg,
Reblochon Reblochon () is a soft washed-rind and smear-ripened French cheese made in the Alpine region of Haute-Savoie from raw cow's milk. It has its own AOC designation. Reblochon was first produced in the Thônes and Arly valleys, in the Aravis mass ...
File:Pouligny-saint-pierre (fromage) 02.jpg, Saint-Pierre Cheese File:Fourme d'Ambert 01.jpg,
Fourme d'Ambert Fourme d'Ambert is a semi-hard French blue cheese. One of France's oldest cheeses, it dates from as far back as Roman times. It is made from raw cow's milk from the Auvergne region of France, with a distinct, narrow cylindrical shape. The semi- ...
File:Blue Stilton 02.jpg,
Stilton cheese Stilton is an English cheese, produced in two varieties: Blue, which has ''Penicillium roqueforti'' added to generate a characteristic smell and taste, and White, which does not. Both have been granted the status of a protected designation of o ...
File:Langres fromage AOP coupe.jpg, Langres File:Emmental (fromage) 01.jpg,
Emmental The Emmental ( en, Emme Valley) is a valley in west-central Switzerland, forming part of the canton of Bern. It is a hilly landscape comprising the basins of the rivers Emme and Ilfis. The region is mostly devoted to farming, particularly dair ...
File:2014-12-08 Bergkäse mit Antipasta 5713.jpg,
Bergkäse ( for, , German, mountain cheese) refers to a number of varieties of cheese produced in the Alps. This includes products of mountain farming, the cultivation of alpine pastures as well as the milk processing of local producers in dairies. The te ...
File:2015-01-25 Tobermory, Isle of Mull Cheese Sgriob-ruadh Farm - hu - 7900.jpg, Isle of Mull Cheese File:Zacharie Cloutier (fromage).jpg, Zacharie cheese File:Sauermilchkaese diverse.jpg, Diverse Sauermilchkäse sour cheese File:Cowgirl Creamery Point Reyes - Red Hawk cheese.jpg, Red Hawk cheese File:Gruyere alpage th wa.jpg, Gruyère File:Wikicheese - Brie de Nangis - 20150515 - 018.jpg, Brie de Nangis File:Rouelle du Tarn.jpg, Rouelle du Tarn File:Comte AOP.jpg, Comté


Cooking and eating

At
refrigerator A refrigerator, colloquially fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so t ...
temperatures, the fat in a piece of cheese is as hard as unsoftened butter, and its protein structure is stiff as well. Flavor and odor compounds are less easily liberated when cold. For improvements in flavor and texture, it is widely advised that cheeses be allowed to warm up to room temperature before eating. If the cheese is further warmed, to , the fats will begin to "sweat out" as they go beyond soft to fully liquid. Above room temperatures, most hard cheeses melt. Rennet-curdled cheeses have a gel-like protein matrix that is broken down by heat. When enough protein bonds are broken, the cheese itself turns from a solid to a viscous liquid. Soft, high-moisture cheeses will melt at around , while hard, low-moisture cheeses such as Parmesan remain solid until they reach about . Acid-set cheeses, including
halloumi Halloumi or haloumi (, el, χαλούμι, haloúmi; tr, hellim}) is a traditional Cypriot cheese made from a mixture of goat's and sheep's milk, and sometimes also cow's milk. Its texture is described as squeaky. It has a high melting point ...
,
paneer Paneer (), also known as ponir () is a fresh acid-set cheese common in the Indian subcontinent (Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan and Sri Lanka) made from full-fat buffalo milk or cow milk. It is a non-aged, non-melting soft ...
, some whey cheeses and many varieties of fresh goat cheese, have a protein structure that remains intact at high temperatures. When cooked, these cheeses just get firmer as water evaporates. Some cheeses, like
raclette Raclette (, ) is a Swiss dish, also popular in the other Alpine countries, based on heating cheese and scraping off the melted part, then typically served with boiled potatoes. Raclette cheese is historically a dish originating from the canton of ...
, melt smoothly; many tend to become stringy or suffer from a separation of their fats. Many of these can be coaxed into melting smoothly in the presence of acids or starch. Fondue, with wine providing the acidity, is a good example of a smoothly melted cheese dish. Elastic stringiness is a quality that is sometimes enjoyed, in dishes including
pizza Pizza (, ) is a dish of Italian origin consisting of a usually round, flat base of leavened wheat-based dough topped with tomatoes, cheese, and often various other ingredients (such as various types of sausage, anchovies, mushrooms, on ...
and
Welsh rarebit Welsh rarebit or Welsh rabbit ( or ) is a dish consisting of a hot cheese-based sauce served over slices of toasted bread. The original 18th-century name of the dish was the jocular "Welsh rabbit", which was later reinterpreted as "rarebit", ...
. Even a melted cheese eventually turns solid again, after enough moisture is cooked off. The saying "you can't melt cheese twice" (meaning "some things can only be done once") refers to the fact that oils leach out during the first melting and are gone, leaving the non-meltable solids behind. As its temperature continues to rise, cheese will
brown Brown is a color. It can be considered a composite color, but it is mainly a darker shade of orange. In the CMYK color model used in printing or painting, brown is usually made by combining the colors orange and black. In the RGB color model used ...
and eventually burn. Browned, partially burned cheese has a particular distinct flavor of its own and is frequently used in cooking (e.g., sprinkling atop items before baking them).


Cheeseboard

A cheeseboard (or cheese course) may be served at the end of a meal before or following dessert, or replacing the last course. The British tradition is to have cheese after dessert, accompanied by sweet wines like Port. In France, cheese is consumed before dessert, with robust red wine. A cheeseboard typically has contrasting cheeses with accompaniments, such as crackers, biscuits, grapes, nuts,
celery Celery (''Apium graveolens'') is a marshland plant in the family Apiaceae that has been cultivated as a vegetable since antiquity. Celery has a long fibrous stalk tapering into leaves. Depending on location and cultivar, either its stalks, le ...
or
chutney A chutney is a spread in the cuisines of the Indian subcontinent. Chutneys are made in a wide variety of forms, such as a tomato relish, a ground peanut garnish, yogurt or curd, cucumber, spicy coconut, spicy onion or mint dipping sauce ...
. A typical cheeseboard may contain 4 to 6 cheeses, for example: Mature Cheddar or Comté (hard: cow's milk cheeses);
Brie Brie (; ) is a soft cow's-milk cheese named after Brie, the French region from which it originated (roughly corresponding to the modern ''département'' of Seine-et-Marne). It is pale in color with a slight grayish tinge under a rind of white m ...
or
Camembert Camembert (, also , ) is a moist, soft, creamy, surface-ripened cow's milk cheese. It was first made in the late 18th century in Camembert, Normandy, in northwest France. It is sometimes compared in look and taste to brie cheese, albeit wi ...
(soft: cow's milk); a blue cheese such as
Stilton Stilton is a village and civil parish in Cambridgeshire, England, about north of Huntingdon in Huntingdonshire, which is a non-metropolitan district of Cambridgeshire as well as a historic county of England. History There is evidence of Neo ...
(hard: cow's milk),
Roquefort Roquefort is a sheep milk cheese from Southern France, and is one of the world's best known blue cheeses. Though similar cheeses are produced elsewhere, EU law dictates that only those cheeses aged in the natural Combalou caves of Roquefort-sur ...
(medium: ewe's milk) or
Bleu d'Auvergne Bleu d'Auvergne () is a French blue cheese, named for its place of origin in the Auvergne region of south-central France. It is made from cow's milk, and is one of the cheeses granted the Appellation d'origine contrôlée from the French govern ...
(medium-soft cow's milk); a soft/medium-soft goat's cheese (e.g.
Sainte-Maure de Touraine Sainte-Maure de Touraine is a French cheese produced in the province of Touraine, mainly in the department of Indre-et-Loire. It is named after the small town of Sainte-Maure-de-Touraine, in the department of Indre-et-Loire, at equal distance fr ...
, Pantysgawn,
Crottin de Chavignol Crottin de Chavignol is a goat cheese produced in the Loire Valley. This cheese is the claim to fame for the village of Chavignol, France, which has only two hundred inhabitants. History The small cylindrical goat cheese from the area around C ...
). A cheeseboard long was used to feature the variety of cheeses manufactured in Wisconsin, where the
state legislature A state legislature is a legislative branch or body of a political subdivision in a federal system. Two federations literally use the term "state legislature": * The legislative branches of each of the fifty state governments of the United Sta ...
recognizes a "
cheesehead Cheesehead is a nickname in the United States for a person from Wisconsin or for a fan of the Green Bay Packers NFL football franchise. Current usage Wisconsin is associated with cheese because the state historically produced more dairy product ...
" hat as a state symbol.


Nutrition and health

The nutritional value of cheese varies widely. Cottage cheese may consist of 4% fat and 11% protein while some whey cheeses are 15% fat and 11% protein, and triple-crème cheeses are 36% fat and 7% protein. In general, cheese is a rich source (20% or more of the Daily Value, DV) of
calcium Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar ...
, protein, phosphorus, sodium and saturated fat. A 28-gram (one
ounce The ounce () is any of several different units of mass, weight or volume and is derived almost unchanged from the , an Ancient Roman unit of measurement. The avoirdupois ounce (exactly ) is avoirdupois pound; this is the United States customa ...
) serving of cheddar cheese contains about of protein and 202 milligrams of calcium. Nutritionally, cheese is essentially concentrated milk, but altered by the culturing and aging processes: it takes about of milk to provide that much protein, and to equal the calcium, though values for water-soluble vitamins and minerals can vary widely.


Cardiovascular disease

National health organizations, such as the American Heart Association, Association of UK Dietitians, British National Health Service, and
Mayo Clinic The Mayo Clinic () is a nonprofit American academic medical center focused on integrated health care, education, and research. It employs over 4,500 physicians and scientists, along with another 58,400 administrative and allied health staff, ...
, among others, recommend that cheese consumption be minimized, replaced in snacks and meals by plant foods, or restricted to low-fat cheeses to reduce caloric intake and blood levels of HDL fat, which is a risk factor for
cardiovascular diseases Cardiovascular disease (CVD) is a class of diseases that involve the heart or blood vessels. CVD includes coronary artery diseases (CAD) such as angina and myocardial infarction (commonly known as a heart attack). Other CVDs include stroke, hea ...
. There is no high-quality clinical evidence that cheese consumption lowers the risk of cardiovascular diseases.


Pasteurization

A number of food safety agencies around the world have warned of the risks of raw-milk cheeses. The U.S. Food and Drug Administration states that soft raw-milk cheeses can cause "serious infectious diseases including
listeriosis Listeriosis is a bacterial infection most commonly caused by ''Listeria monocytogenes'', although '' L. ivanovii'' and '' L. grayi'' have been reported in certain cases. Listeriosis can cause severe illness, including severe sepsis, meni ...
,
brucellosis Brucellosis is a highly contagious zoonosis caused by ingestion of unpasteurized milk or undercooked meat from infected animals, or close contact with their secretions. It is also known as undulant fever, Malta fever, and Mediterranean fever. Th ...
, salmonellosis and tuberculosis".FDA Warns About Soft Cheese Health Risk"
.
Consumer Affairs Consumer protection is the practice of safeguarding buyers of goods and services, and the public, against unfair practices in the marketplace. Consumer protection measures are often established by law. Such laws are intended to prevent business ...
. Retrieved October 15, 2005.
It is U.S. law since 1944 that all raw-milk cheeses (including imports since 1951) must be aged at least 60 days. Australia has a wide ban on raw-milk cheeses as well, though in recent years exceptions have been made for Swiss Gruyère,
Emmental The Emmental ( en, Emme Valley) is a valley in west-central Switzerland, forming part of the canton of Bern. It is a hilly landscape comprising the basins of the rivers Emme and Ilfis. The region is mostly devoted to farming, particularly dair ...
and Sbrinz, and for French
Roquefort Roquefort is a sheep milk cheese from Southern France, and is one of the world's best known blue cheeses. Though similar cheeses are produced elsewhere, EU law dictates that only those cheeses aged in the natural Combalou caves of Roquefort-sur ...
. There is a trend for cheeses to be pasteurized even when not required by law. Pregnant women may face an additional risk from cheese; the U.S.
Centers for Disease Control The Centers for Disease Control and Prevention (CDC) is the national public health agency of the United States. It is a United States federal agency, under the Department of Health and Human Services, and is headquartered in Atlanta, Georgi ...
has warned pregnant women against eating soft-ripened cheeses and blue-veined cheeses, due to the
listeria ''Listeria'' is a genus of bacteria that acts as an intracellular parasite in mammals. Until 1992, 17 species were known, each containing two subspecies. By 2020, 21 species had been identified. The genus is named in honour of the British pi ...
risk, which can cause miscarriage or harm the fetus.Listeria and Pregnancy.
. Retrieved February 28, 2006.


Cultural attitudes

Although cheese is a vital source of nutrition in many regions of the world and it is extensively consumed in others, its use is not universal. Cheese is rarely found in Southeast and East Asian cuisines, presumably for historical reasons as dairy farming has historically been rare in these regions, due in part to low rates of
lactase persistence Lactase persistence is the continued activity of the lactase enzyme in adulthood, allowing the digestion of lactose in milk. In most mammals, the activity of the enzyme is dramatically reduced after weaning. In some human populations, though, lac ...
. Paneer (pronounced əniːr is a fresh cheese common in North India and Pakistan. It is an unaged, non-melting soft cheese made by curdling milk with a fruit- or vegetable-derived acid, such as lemon juice. Its acid-set form, (cheese curd) before pressing, is called chhena. In Nepal, the Dairy Development Corporation commercially manufactures cheese made from
yak The domestic yak (''Bos grunniens''), also known as the Tartary ox, grunting ox or hairy cattle, is a species of long-haired domesticated cattle found throughout the Himalayan region of the Indian subcontinent, the Tibetan Plateau, Kachin Sta ...
milk and a hard cheese made from either cow or yak milk known as chhurpi. The national dish of
Bhutan Bhutan (; dz, འབྲུག་ཡུལ་, Druk Yul ), officially the Kingdom of Bhutan,), is a landlocked country in South Asia. It is situated in the Eastern Himalayas, between China in the north and India in the south. A mountainou ...
,
ema datshi Ema datshi ( dz, ཨེ་མ་དར་ཚིལ་; Wylie: ) is among the most famous dishes in Bhutanese cuisine, recognized as a national dish of Bhutan. It is made from hot chili peppers and cheese; "ema" means "chili" and "datshi" means " ...
, is made from homemade yak or mare milk cheese and hot peppers. In Yunnan, China, several ethnic minority groups produce Rushan and
Rubing Rubing () is a firm, acid-set, non-melting, fresh goat milk farmer cheese made in the Yunnan Province of China by people of the Bai and Sani (recognized as a branch of the Yi in China) minorities. Its Bai name is ''youdbap'', meaning "goat's m ...
from cow's milk. Cheese consumption may be increasing in China, with annual sales doubling from 1996 to 2003 (to a still small 30 million
U.S. dollars The United States dollar (symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official ...
a year). Certain kinds of Chinese preserved
bean curd A bean is the seed of several plants in the family Fabaceae, 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 thr ...
are sometimes misleadingly referred to in English as "Chinese cheese" because of their texture and strong flavor. Strict followers of the dietary laws of Islam and Judaism must avoid cheeses made with
rennet Rennet () is a complex set of enzymes produced in the stomachs of ruminant mammals. Chymosin, its key component, is a protease enzyme that curdles the casein in milk. In addition to chymosin, rennet contains other enzymes, such as pepsin and ...
from animals not slaughtered in a manner adhering to halal or kosher laws. Both faiths allow cheese made with vegetable-based rennet or with rennet made from animals that were processed in a halal or kosher manner. Many less orthodox Jews also believe that rennet undergoes enough processing to change its nature entirely and do not consider it to ever violate kosher law. (See '' Cheese and kashrut''.) As cheese is a dairy food, under kosher rules it cannot be eaten in the same meal with any meat. Rennet derived from animal slaughter, and thus cheese made with animal-derived rennet, is not vegetarian. Most widely available vegetarian cheeses are made using rennet produced by fermentation of the fungus ''
Mucor miehei ''Rhizomucor miehei'' (also: ''Mucor miehei'' ) is a species of fungus. It is commercially used to produce enzymes which can be used to produce a microbial rennet to curd milk and produce cheese. Under experimental conditions, this species grow ...
''.
Vegan 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. ...
s and other dairy-avoiding vegetarians do not eat conventional cheese, but some vegetable-based cheese substitutes (
soy The soybean, soy bean, or soya bean (''Glycine max'') is a species of legume native to East Asia, widely grown for its edible bean, which has numerous uses. Traditional unfermented food uses of soybeans include soy milk, from which tofu and ...
or almond) are used as substitutes. Collecting cheese labels is called " tyrosemiophilia".


Odorous cheeses

Even in cultures with long cheese traditions, consumers may perceive some cheeses that are especially pungent-smelling, or mold-bearing varieties such as
Limburger Limburger (in southern Dutch contexts Rommedoe, and in Belgium Herve cheese) is a cheese that originated in the Herve area of the historical Duchy of Limburg, which had its capital in Limbourg-sur-Vesdre, now in the French-speaking Belgian pr ...
or
Roquefort Roquefort is a sheep milk cheese from Southern France, and is one of the world's best known blue cheeses. Though similar cheeses are produced elsewhere, EU law dictates that only those cheeses aged in the natural Combalou caves of Roquefort-sur ...
, as unpalatable. Such cheeses are an
acquired taste An acquired taste is an appreciation for something unlikely to be enjoyed by a person who has not had substantial exposure to it. It is the opposite of innate taste, which is the appreciation for things that are enjoyable by most persons without ...
because they are processed using molds or
microbiological culture A microbiological culture, or microbial culture, is a method of multiplying microbial organisms by letting them reproduce in predetermined culture medium under controlled laboratory conditions. Microbial cultures are foundational and basic diagn ...
s, allowing odor and flavor molecules to resemble those in rotten foods. One author stated: "An aversion to the odor of decay has the obvious biological value of steering us away from possible food poisoning, so it is no wonder that an animal food that gives off whiffs of shoes and soil and the stable takes some getting used to."


Effect on sleep

There is some support from studies that dairy products can help with insomnia. Scientists have debated how cheese might affect sleep. There is some evidence that the tryptophan in cheese can be sleep-inducing, as it is a hormone that reduces stress and stabilizes nerve cells. The high levels of calcium in cheese facilitate the use of tryptophan in the body to produce melatonin, which induces sleep. An antithetical folk belief that cheese eaten close to bedtime can cause nightmares may have arisen from the Charles Dickens novella ''
A Christmas Carol ''A Christmas Carol. In Prose. Being a Ghost Story of Christmas'', commonly known as ''A Christmas Carol'', is a novella by Charles Dickens, first published in London by Chapman & Hall in 1843 and illustrated by John Leech. ''A Christmas Ca ...
'', in which Ebenezer Scrooge attributes his visions of Jacob Marley to the cheese he ate. This belief can also be found in folklore that predates this story. The theory has been disproven multiple times, although night cheese may cause vivid dreams or otherwise disrupt sleep due to its high saturated fat content, according to studies by the British Cheese Board. Other studies indicate it may actually make people dream less.


Figurative expressions

In the 19th century, "cheese" was used as a figurative way of saying "the proper thing"; this usage comes from Urdu cheez "a thing," from Persian cheez, from Old Persian...ciš-ciy
hich means Ij ( fa, ايج, also Romanized as Īj; also known as Hich and Īch) is a village in Golabar Rural District, in the Central District of Ijrud County, Zanjan Province, Iran Iran, officially the Islamic Republic of Iran, and also ...
"something." The term "cheese" in this sense was " cked up by olonialBritish in India by 1818 and
as also As, AS, A. S., A/S or similar may refer to: Art, entertainment, and media * A. S. Byatt (born 1936), English critic, novelist, poet and short story writer * "As" (song), by Stevie Wonder * , a Spanish sports newspaper * , an academic male voice ...
used in the sense of "a big thing", for example in the expression "he's the real cheez". The expression "big cheese" was attested in use in 1914 to mean an "important person"; this is likely "American English in origin". The expression "to cut a big cheese" was used to mean "to look important"; this figurative expression referred to the huge wheels of cheese displayed by cheese retailers as a publicity stunt. The phrase "cut the cheese" also became an American slang term meaning to flatulate. The word "cheese" has also had the meaning of "an ignorant, stupid person." Other figurative meanings involve the word "cheese" used as a verb. To "cheese" is recorded as meaning to "stop (what one is doing), run off," in 1812 (this was "thieves' slang"). To be "cheesed off" means to be annoyed. The expression, "
Say cheese "Say 'cheese is an English-language instruction used by photographers who want their subject or subjects to smile. By saying "cheese", most people form their mouths into what appears to be a smile-like shape. History In the late 19th century, d ...
" in a photograph-taking context (when the photographer wants the people to smile for the photo), which means "smile", dates from 1930 (the word was probably chosen because the "ee" encourages people to make a smile). The verb "cheese" was used as slang for "be quiet" in the early 19th century in Britain. The fictional "...notion that the moon is made of green cheese as a type of a ridiculous assertion is from 1520s". The figurative expression "to make cheeses" is an 1830s phrase referring to schoolgirls who amuse themselves by "...wheeling rapidly so one's petticoats blew out in a circle then dropping down so they came to rest inflated and resembling a wheel of cheese". In video game slang "to cheese it" means to win a game by using a strategy that requires minimal skill and knowledge or that exploits a
glitch A glitch is a short-lived fault in a system, such as a transient fault that corrects itself, making it difficult to troubleshoot. The term is particularly common in the computing and electronics industries, in circuit bending, as well as among ...
or flaw in game design. The adjective "cheesy" has two meanings. The first is literal, and means "cheese-like"; this definition is attested to from the late 14th century (e.g., "a cheesy substance oozed from the broken jar"). In the late 19th century, medical writers used the term "cheesy" in a more literal sense, "to describe morbid substances found in tumors, decaying flesh, etc." The adjective also has a figurative sense, meaning "cheap, inferior"; this use "... is attested from 1896, perhaps originally U.S. student slang". In the late 19th century in British slang, "cheesy" meant "fine, showy"; this use is attested to in the 1850s. In writing
lyrics Lyrics are words that make up a song, usually consisting of verses and choruses. The writer of lyrics is a lyricist. The words to an extended musical composition such as an opera are, however, usually known as a "libretto" and their writer, a ...
for pop music, rock music or musical theatre, "cheesy" is a pejorative term which means "blatantly artificial" (''OED'').


See also

* Dutch cheese markets *
List of cheese dishes This is a list of notable cheese dishes in which cheese is used as a primary ingredient or as a significant component of a dish or a food. Cheese is a food derived from milk that is produced in a wide range of flavors, textures, and forms by coa ...
* List of cheeses *
List of dairy products This is a list of dairy products. A dairy product is food produced from the milk of mammals. A production plant for the processing of milk is called a dairy or a dairy factory. Dairy farming is a class of agricultural, or an animal husbandry, ente ...
*
List of microorganisms used in food and beverage preparation List of Useful Microorganisms Used In preparation Of Food And Beverage See also * Fermentation (food) * Food microbiology References {{reflist Brewing Fermentation in food processing Food science Metabolism Mycology Oenology Lists of ...
* Sheep milk cheese


References


Bibliography

* * *


Further reading

* Layton, T.A. (1967) ''The ... Guide to Cheese and Cheese Cookery''. London: Wine and Food Society (reissued by the Cookery Book Club, 1971) *


External links

*
Cheese.com
– includes an extensive database of different types of cheese.

– why is one cheese type different from another? {{Authority control Ancient dishes Condiments Dairy products Articles containing video clips Types of food