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' (also ' or , ) is a set of dietary laws dealing with the foods that Jewish people are permitted to eat and how those foods must be prepared according to halakha. Food that may be consumed is deemed kosher ( in English, ), from the Ashkenazi Hebrew pronunciation of the term that in Sephardi Hebrew or Modern Hebrew is pronounced kashér (), meaning "fit" (in this context: "fit for consumption"). Food that may not be consumed, however, is deemed treif ( in English, ), also spelled treyf (). In case of objects the opposite of kosher is pasúl ( in English, Yiddish: פָּסוּל).
Although the details of the laws of are numerous and complex, they rest on a few basic principles:
Every food that is considered kosher is also categorized as follows:
While any produce that grows from the earth, such as fruits, grains, vegetables, and mushrooms, is always permissible, laws regarding the status of certain agricultural produce, especially that grown in the Land of Israel such as tithes and produce of the Shemitta, impact their permissibility for consumption.
Most of the basic laws of are derived from the Torah's books of Leviticus and Deuteronomy. Their details and practical application, however, are set down in the Oral Torah, (eventually codified in the Mishnah and Talmud), and elaborated on in the later rabbinical literature. Although the Torah does not state the rationale for most laws, some suggest that they are only tests of obedience,Maimonides, Guide for the Perplexed (ed. M. Friedländer), Part III (chapter 26), New York 1956, p. 311 while others have suggested philosophical, practical, and hygienic reasons.Maimonides, Guide for the Perplexed (ed. M. Friedländer), Part III (chapter 48), New York 1956, p. 371Rashbam, commentary to Leviticus 11:3Sefer ha-Chinuch, commandments 73 and 148
Over the past century, many certification agencies have started to certify products, manufacturers, and restaurants as kosher, usually authorizing the use of a proprietary symbol or certificate, called a , to be displayed by the food establishment or on the product, which indicates that they are in compliance with the kosher laws. This labeling is also used by some non-Jewish people, examples of which include those whose religions (including Islam) expect adherence to a similar set of dietary laws, people with allergies to dairy foods, and vegans, who use the various kosher designations to determine whether a food contains meat or dairy-derived ingredients.
The laws of Kashrut are a major area covered in traditional rabbinic ordination; see and . And numerous scholarly and popular works exist on these topics,For the example the series by Rabbi Aharon Pfeuffer. covering both practice and theory.
Some Jewish scholars say that should be categorized as laws for which there is no particular explanation since the human mind is not always capable of understanding divine intentions. In this line of thinking, the dietary laws were given as a demonstration of God's authority, and man must obey without asking why. Although Maimonides concurs that all the statutes of the Torah are decrees, he is of the view that whenever possible, one should seek out reasons for the Torah's commandments. Mishneh Torah , Temurah 4:13 (in eds. Frankel; "Rambam L'Am")
Some theologians have said that the laws of are symbolic in character: kosher animals represent , while non-kosher animals represent . The 1st-century BCE Letter of Aristeas argues that the laws "have been given ... to awake pious thoughts and to form the character". Letter of Aristeas, 145–154 This view reappears in the work of the 19th-century Rabbi Samson Raphael Hirsch.
The Torah prohibits "cooking the kid (goat, sheep, calf) in its mother's milk". While the Torah does not provide a reason, it has been suggested that the practice was perceived as cruel and insensitive. quoting Deuteronomy Rabbah 6:1
Hasidic Judaism believes that everyday life is imbued with channels connecting with God, the activation of which it sees as helping the Shechinah to be drawn into the physical world; Hasidism argues that the food laws are related to the way such channels, termed 'sparks of holiness', interact with various animals. These 'sparks of holiness' are released whenever a Jew manipulates any object for a 'holy reason', (which includes eating); however, not all animal products are capable of releasing their 'sparks of holiness'. The Hasidic argument is that animals are imbued with signs that reveal the release of these sparks, and the signs are expressed in the biblical categorization of ritually 'clean' and ritually 'unclean'., rabbifriedman.org (archived from the original on August 29, 2007).
In 1953, David Macht, an Orthodox Jew and proponent of the theory of biblical scientific foresight, conducted toxin experiments on many kinds of animals and fish. His experiment involved lupin seedlings being supplied with extracts from the meat of various animals; Macht reported that in 100% of cases, extracts from ritually 'unclean' meat inhibited the seedling's growth more than that from ritually 'clean' meats. op. cit.
At the same time, these explanations are controversial. Scholar Lester L. Grabbe, writing in the Oxford Bible Commentary on Leviticus, says "an explanation now almost universally rejected is that the laws in this section have hygiene as their basis. Although some of the laws of ritual purity roughly correspond to modern ideas of physical cleanliness, many of them have little to do with hygiene. For example, there is no evidence that the 'unclean' animals are intrinsically bad to eat or to be avoided in a Mediterranean climate, as is sometimes asserted." The Oxford Bible Commentary, eds. J. Barton and J. Muddiman. Oxford: Oxford University Press. 2001: 99.
Biblically prohibited foods include:
Biblically prohibited mixtures include:
Rabbinically prohibited foods include:
In 2008, a rabbinical ruling determined that giraffes and their milk are eligible to be considered kosher. The giraffe has both split hooves and chews its cud, characteristics of animals considered kosher. Findings from 2008 show that giraffe milk curdles, meeting kosher standards. Although kosher, the giraffe is not slaughtered today because the process would be very costly. Giraffes are difficult to restrain, and their use for food could cause the species to become endangered. Shulchan Aruch, Yoreh De'ah 82:1–5
Non-kosher birds are listed outright in the Torah, but the exact zoological references are disputed and some references refer to families of birds (24 are mentioned). The Mishnah Bavli Chullin 3:22–23 refers to four signs provided by the Chazal. First, a (predatory bird) is not kosher. Additionally, kosher birds possess three physical characteristics: an extra toe in the back (which does not join the other toes in supporting the leg), a (crop), and a (gizzard) with a peelable lumen. However, individual Jews are barred from merely applying these regulations alone; an established tradition () is necessary to allow birds to be consumed, even if it can be substantiated that they meet all four criteria. The only exception to this is the turkey. There was a time when certain authorities considered the signs sufficient, so Jews started eating this bird without a because it possesses all the signs () in Hebrew.
Fish must have fins and scales to be kosher. Shellfish and other non-fish water fauna are not kosher. Shulchan Aruch, Yoreh De'ah 83 and 84 (See kosher species of fish.) Insects are not kosher, except for certain species of kosher locust. Shulchan Aruch, Yoreh De'ah 85 Any animal that eats other animals, whether they kill their food or eat carrion, is generally not kosher, as well as any animal that has been partially eaten by other animals.
Observant Jews have separate sets of dishes, and sometimes different kitchens, for meat and milk, and wait anywhere between one and six hours after eating meat before consuming milk products. Shulchan Aruch, Yoreh De'ah 87 et seq The and (literally "milky" and "meaty") utensils and dishes are the commonly referred-to Yiddish delineations between dairy and meat ones, respectively.
According to the Shulchan Aruch, a six-hour waiting period is recommended between consuming meat and dairy. During this time, it is generally advised to abstain from brushing and rinsing the mouth.A halachic answer on the topic of after eating meat, can I use dental floss, and rinsing my mouth, and eat milk without waiting 6 hours on the website "Meshiv Kahlahah".
Shelomo Dov Goitein writes, "the dichotomy of the kitchen into a meat and a milk section, so basic in an observant Jewish household, is ... never mentioned in the Cairo Geniza." Goitein believed that in the early Middle Ages Jewish families kept only one set of cutlery and cooking ware.Goitein, Shelomo Dov. A Mediterranean Society: The Jewish Communities of the Arab World as Portrayed in the Documents of the Cairo Geniza, Vol. IV. p. 252. . According to David C. Kraemer, the practice of keeping separate sets of dishes developed only in the late 14th and 15th centuries.Kraemer, David C. (2007). Jewish Eating and Identity Through the Ages. New York: Routledge. pp. 99–121. . It is possible observant Jews before then waited overnight for the meat or dairy gravy absorbed in a pot's walls to become insignificant () before using the pot for the other foodstuff (meat or dairy).
The body of the slaughtered animal must be checked after slaughter to confirm that the animal had no medical condition or defect that would have caused it to die of its own accord within a year, which would make the meat unsuitable. Shulchan Aruch, Yoreh De'ah 1–65
These conditions () include 70 different categories of injuries, diseases, and abnormalities whose presence renders the animal non-kosher.
It is forbidden to consume certain parts of the animal, such as certain fats () and the from the legs, the process of Nikkur being done by experts before the meat is sold.
As much blood as possible must be removed through the process; this is usually done through soaking and salting the meat, but the liver, as it is rich in blood, is grilled over an open flame. Shulchan Aruch, Yoreh De'ah 66–78
Fish (and kosher locusts, for those who follow the traditions permitting them) must be killed before being eaten, but no particular method has been specified in Jewish law. Legal aspects of ritual slaughter are governed not only by Jewish law but civil law as well.
Some believe that this ensures the animal dies instantly without unnecessary suffering, but many animal rights activists view the process as cruel, claiming that the animal may not lose consciousness immediately, and activists have called for it to be banned.
Meat that is roasted requires no prior salting, as fire causes a natural purging of blood.
Some Orthodox Jewish communities require the additional stricture of submersing raw meat in boiling water prior to cooking it, a practice known as (), "blanching."Maimonides, Mishne Torah ( Hil. Ma'achaloth Asuroth 6:10); cf. Babylonian Talmud, Hullin 111a. This was believed to constrict the blood lodged within the meat, to prevent it from oozing out when the meat was eaten. The raw meat is left in the pot of boiling water for as long as it takes for the meat to whiten on its outer layer.
If someone wanted to use the water for soup after making in the same pot, they could simply scoop out the film, froth and scum that surface in the boiling water.
Some such utensils, depending on the material they are made from, can be made suitable for preparing kosher food again by immersion in boiling water or by the application of a blowtorch.
Food prepared in a manner that violates the (Sabbath) may not be eaten; although in certain instances it is permitted after the is over. Shulchan Aruch, Orach Chayim, 318:1
Utensils used in preparing and serving are also forbidden on Passover unless they have been ritually cleansed (). Shulchan Aruch, Orach Chayim, 431–452
Observant Jews often keep separate sets of meat and dairy utensils for Passover use only. In addition, some groups follow various eating restrictions on Passover that go beyond the rules of , such as not eating , or garlic.
For produce grown in the Land of Israel a modified version of the biblical must be applied, including , , , and (untithed produce is called ); the fruit of the first three years of a tree's growth or replanting are forbidden for eating or any other use as ; produce grown in the Land of Israel on the seventh year obtains , and unless managed carefully is forbidden as a violation of the (Sabbatical Year).
Some rules of are subject to different rabbinical opinions. For example, many hold that the rule against eating (new grain) before the 16th of the month Nisan does not apply outside the Land of Israel.
Some processes convert a meat- or dairy-derived product into a pareve one. For example, rennet is sometimes made from stomach linings, yet is acceptable for making kosher cheese."The rennet must be kosher, either microbial or from special productions of animal rennet using kosher calf stomachs." Oukosher.org , Retrieved August 10, 2005. Gelatins derived from kosher animal sources (which were ritually slaughtered) are also pareve. Other gelatin-like products from non-animal sources such as agar agar and carrageenan are pareve by nature. Fish gelatin, like all kosher fish products, is pareve.
Jewish law generally requires that bread be kept pareve (i.e., not kneaded with meat or dairy products nor made on meat or dairy equipment).
For example, dairy manufacturing equipment can be cleaned well enough that the rabbis grant pareve status to products manufactured with it but someone with a strong allergic sensitivity to dairy products might still react to the dairy residue. This is why some products that are legitimately pareve carry "milk" warnings.
In Israel, this certification is given by a private rabbinic group Beit Yosef, but the Chief Rabbinate has objected to granting of any certification by rabbis because of health risks from tobacco.
In 2015, the Committee on Jewish Law and Standards of the Rabbinical Assembly released a document regarding genetically modified organisms, stating that modification of gene sequences via the introduction of foreign DNA in order to convey a specific capability in the new organism is allowable, that entirely new species should not be intentionally created, and that the health implications of genetically modified foods must be considered on an individual basis.Nevins, Rabbi David S. 10 November 2015. " Halakhic Perspectives on Genetically Modified Organisms". Rabbinical Assembly.
Some put forth that this intermixing of species is against the teachings of the Talmud and thus against Jewish Law and non-kosher. Others argue that the one in sixty parts law of is of significance, and that the foreign gene accounts for less than 1/60 of the animal and thus the modified salmon is kosher.
Producers of foods and food additives can contact Jewish religious authorities to have their products certified as kosher: this involves a visit to the manufacturing facilities by an individual rabbi or a committee from a rabbinic organization, who will inspect the production methods and contents and, if everything is sufficiently kosher a certificate would be issued.
Manufacturers sometimes identify the products that have received such certification by adding particular graphical symbols to the label. These symbols are known in Judaism as . Due to differences in kashrut standards held by different organizations, the hechsheirim of certain Jewish authorities may at times be considered invalid by other Jewish authorities. The certification marks of the various rabbis and organisations are too numerous to list, but one of the most commonly used in the United States of America is that of the Union of Orthodox Congregations, who use a U inside a circle ("O-U"), symbolising the initials of Orthodox Union. In Britain, commonly used symbols are the "KLBD" logo of the London Beth Din and the "MK" logo of the Manchester Beth Din. A single K is sometimes used as a symbol for kosher, but since many countries do not allow letters to be (the method by which other symbols are protected from misuse), it only indicates that the company producing the product claims that it is kosher.
Many of the certification symbols are accompanied by additional letters or words to indicate the category of the product, according to Jewish law; the categorization may conflict with legal classifications, especially in the case of food that Jewish law regards as dairy, but legal classification does not.
In many cases constant supervision is required because, for various reasons such as changes in manufacturing processes, products that once were kosher may cease to be so. For example, a kosher lubricating oil may be replaced by one containing tallow, which many rabbinic authorities view as non-kosher. Such changes are often coordinated with the supervising rabbi or supervising organization to ensure that new packaging does not suggest any hechsher or kashrut. In some cases, however, existing stocks of pre-printed labels with the hechsher may continue to be used on the non-kosher product. An active grapevine among the Jewish community discusses which products are questionable, as well as products which have become kosher but whose labels have yet to carry the hechsher. Some newspapers and periodicals also discuss kashrut products.
Products labeled kosher-style are non-kosher products that have characteristics of kosher foods, such as all-beef , or are flavored or prepared in a manner consistent with Ashkenazi practices, like dill pickles. The designation usually refers to delicatessen items.
In 2014 the Israeli Defense Forces decided to allow female kosher supervisors to work in its kitchens on military bases, and the first women kosher inspectors were certified in Israel.
In some European Jewish communities, kosher supervision of meat includes a "tax" used to fund Jewish education in the community, which makes kosher meat more expensive than the cost of supervision alone would imply.
About a sixth of American Jews or 0.3% of the American population fully keep kosher, and many more of them do not strictly follow all of the rules but still abstain from some prohibited foods, especially pork. The Seventh-day Adventist Church, a Christian denomination, preaches a health message which expects adherence to the kosher dietary laws.
Surveys conducted in 2013 and 2020 found that 22% of American Jews by religion claimed to keep kosher in their homes. Pork consumption in particular seems to be a bigger taboo than other non-Kosher eating practices among Jews, with 41% claiming to at least abstain from eating pork. American Jews are generally less strict about Kosher laws when compared to Israeli Jews. Nearly three times as many Israeli Jews reported that they commit to keeping kosher in their homes and 84% do not eat pork.
The notion of "kosher style" serves individuals and communities navigating between strict religious observance and cultural identification with Jewish culinary traditions. Hasia Diner, a professor of American Jewish history at New York University, suggests that "kosher-style" represents a balancing act between tradition and assimilation, providing a sense of Jewish identity through food without strict adherence to kashrut.
This flexible practice emerged in the 1920s amongst Jews assimilating into American society, who sought connection to their heritage without fully observing dietary laws. The term is broad and encompasses foods that could be kosher, like chicken noodle soup or pareve meals (neither meat nor dairy), even if they don't meet halakhic standards. Diner points out the term is "oxymoronic," creating an illusion of kashrut where the true emphasis is on a style of cuisine rather than compliance with religious dietary laws.
Over time, the meaning of "kosher style" has evolved and expanded, reflecting changes within Jewish communities and broader society. In contemporary practice, "kosher style" is often encountered at social events and gatherings, where meals might exclude certain non-kosher items but not adhere strictly to kashrut. The exact definition may vary between communities and individuals, reflecting diverse interpretations and practices related to Jewish dietary laws. The term also relates to products marketed as "kosher style," prompting some regions to establish legislation to clarify labeling and prevent consumer misunderstanding. For instance, kosher-style pickles might be produced without kosher certification or supervision but are associated with Jewish culinary tradition.
The word is derived from Hebrew language, due to influence of Sephardi Jews who came to Suriname in the 17th century. This is also the source of Sranan kaseri 'ritually clean, kosher'.
(2025). 9783856168476, Christoph Merian. ISBN 9783856168476 This applies also to the fruit of the vine—grapes, and wine produced from them.
Permitted and forbidden animals
Only meat from particular species is permissible. Mammals that both chew their cud (Ruminant) and have Cloven hoof can be kosher. Animals with one characteristic but not the other (the camel, the hyrax, and the hare because they have no cloven hooves, and the pig because it does not ruminate) are specifically excluded. Shulchan Aruch, Yoreh De'ah 79For a comprehensive review of the issue involving the difficulty that neither the hyrax nor the hare are ruminants, see Rabbi Nosson Slifkin (2025). 9781568713120, Zoo Torah in association with Targum/Feldheim. . ISBN 9781568713120
>Mammals Carnivores; animals that do not chew the cud (e.g., the pig); animals that do not have cloven hooves (e.g., the camel, the [[hare]], the horse and the [[hyrax]]); bats; rodents
>Birds Birds of prey; scavengers
>Reptiles and amphibians All
>Water animals All non-fish. Among fish, all those that do not have both fins and scales
>Insects All, except particular types of locust or grasshopper that, according to most, cannot be identified today
Separation of meat and milk
Meat and milk (or derivatives) may not be mixed in the sense that meat and are not served at the same meal, served or cooked in the same utensils, or stored together.
Kosher slaughter
Mammals and fowl must be slaughtered by a trained individual (a ) using a special method of slaughter, . slaughter severs the jugular vein, carotid artery, esophagus, and trachea in a single continuous cutting movement with an unserrated, sharp knife. Failure to meet any of these criteria renders the meat of the animal non-kosher.
Preparation of meats
When an animal is ritually slaughtered () the raw meat is traditionally cut, salted, and rinsed, prior to cooking. Salting of raw meat draws out the blood that lodges on the inner surface of the meat. The salting is done with coarse grain salt, commonly referred to as kosher salt, after which the meat is laid over a grating or colander to allow for drainage, remaining so for the duration of time that it takes to walk one biblical mileShulhan Arukh, Yoreh De'ah 69:6, 69:16–19 (approximately 18–24 minutes). Afterwards, the residue of salt is rinsed away with water, and the meat cooked.
("Taz"), a 17th-century commentary on the ''[[Shulchan Arukh]]'', ruled that the pieces of meat can be "very thick" when salting.Shulhan Arukh, ''Yoreh De'ah'', § 69:5; ''Turei Zahav'', ''Yoreh De'ah'' 69:5:16 The [[Yemenite Jewish]] practice, however, follows [[Saadiah Gaon]], who required that the meat not be larger than half a "rotal" (i.e. roughly ) when salting. This allows the effects of the salt to penetrate.
is not required when roasting meat over a fire, as the fire constricts the blood.
Kosher utensils
Utensils used for non-kosher foods become non-kosher, and make even otherwise kosher food prepared with them non-kosher.
Passover laws
Passover has stricter dietary rules, the most important of which is the prohibition on eating leavened bread or derivatives of this, which are known as . This prohibition is derived from Exodus 12:15.
Produce of the Land of Israel
Biblical rules also control the use of agriculture produce, for example, with respect to their tithing, or when it is permitted to eat them or to harvest them, and what must be done to make them suitable for human consumption.
Vegetables
Although plants and minerals are nearly always kosher, vegetarian restaurants and producers of vegetarian foods are required to obtain a , certifying that a rabbinical organization has approved their products as being kosher, because the usually certifies that certain vegetables have been checked for insect infestation and steps have been taken to ensure that cooked food meets the requirements of . Vegetables such as spinach and cauliflower must be checked for insect infestation. The proper procedure for inspecting and cleaning varies by species, growing conditions, and views of individual rabbis.
Pareve foods
A pareve food is one which is neither meat nor dairy. Fish fall into this category, as well as any food that is not animal-derived. Eggs are also considered pareve despite being an animal product.
has procedures by which equipment can be cleaned of its previous non-kosher or meat/dairy use, but those may be inadequate for vegetarians, those with allergies, or adherents to other religious laws.
Cannabis
For cannabis grown in Israel, the plants must observe , but this does not apply to cannabis from elsewhere. At least one brand of cannabis edibles is certified to follow the laws of .
Tobacco
Although it is not a food product, some tobacco receives a year-long kosher for Passover certification. This year-long certification means that the tobacco is certified also for Passover where different restrictions may be in place. Tobacco may, for example, come into contact with some grains that are strictly forbidden during Passover and the certification is a guarantee that it is free from this type of contamination.
Genetically modified foods
With the advent of genetic engineering, scholars in both academia and Judaic faith have differing viewpoints on whether these new strains of foods are to be considered kosher or not. The first genetically modified animal approved by the FDA for human consumption is the AquAdvantage salmon and, while salmon is normally an acceptably kosher food, this modified organism has a gene from a non-kosher organism.
Supervision and marketing
Hashgacha
Certain foods must be prepared in whole or in part by Jews. This includes kosher wine, Shulchan Aruch, Yoreh De'ah 114 certain cooked foods ( Bishul Yisrael), Shulchan Aruch, Yoreh De'ah 113 cheese ( g'vinat akum), and according to some also butter ( chem'at akum), Shulchan Aruch, Yoreh De'ah 115 dairy products (Hebrew: חלב ישראל chalav Yisrael "milk of Israel"),Many rely on lenient rulings by Rabbi Moshe Feinstein in Teshuvot Igrot Moshe, Yoreh De'ah 1:47 and other 20th century rabbinic authorities who rule that strict government supervision prevents the admixture of non-kosher milk, making supervision unnecessary. See and bread (Pas Yisroel). Shulchan Aruch, Yoreh De'ah 112, Orach Chayim 603
Product labeling standards
Although reading the label of food products can identify obviously non-kosher ingredients, some countries allow manufacturers to omit identification of certain ingredients. Such "hidden" ingredients may include and , among other Food additive; in some cases, for instance, the use of natural flavorings, these ingredients are more likely to be derived from non-kosher substances. Furthermore, certain products, such as fish, have a high rate of mislabeling, which may result in a non-kosher fish being sold in a package labeled as a species of kosher fish.
History of kosher supervision and marketing
Food producers often look to expand their markets or marketing potential, and offering kosher food has become a way to do that. The uniqueness of kosher food was advertised as early as 1849. In 1911 Procter & Gamble became the first company to advertise one of their products, Crisco, as kosher.
Over the next two decades, companies such as Lender's Bagels, Maxwell House, Manischewitz, and Empire Kosher evolved and gave the kosher market more shelf-space. In the 1960s, Hebrew National hotdogs launched a "we answer to a higher authority" campaign to appeal to Jews and non-Jews alike. From that point on, "kosher" became a symbol for both quality and value. The kosher market quickly expanded, and with it more opportunities for kosher products. Menachem Lubinsky, founder of the Kosherfest trade fair, estimates as many as kosher consumers and in sales of kosher products in the U.S.
Legal usage
Advertising standards laws in many jurisdictions prohibit the use of the phrase kosher in a product's labeling unless the producer can show that the product conforms to Jewish dietary laws; however, different jurisdictions often define the legal qualifications for conforming to Jewish dietary laws differently. For example, in some places the law may require that a rabbi certify the kashrut nature, in others the rules of kosher are fully defined in law, and in others still it is sufficient that the manufacturer only believes that the product complies with Jewish dietary regulations. In several cases, laws restricting the use of the term kosher have later been determined to be illegal religious interference.
Costs
In the United States, the cost of certification for mass-produced items is typically minuscule and is usually more than offset by the advantages of being certified. In 1975 The New York Times estimated the cost per item for obtaining kosher certification at 6.5 millionths of a cent ($0.000000065) per item for a General Foods frozen-food item. According to a 2005 report by Burns & McDonnell, most U.S. national certifying agencies are non-profit, only charging for supervision and on-site work, for which the on-site supervisor "typically makes less per visit than an auto mechanic does per hour". However, re-engineering an existing manufacturing process can be costly. Certification usually leads to increased revenues by opening up additional markets to who keep kosher, who keep halal, Seventh-day Adventists who keep the main laws of Kosher Diet, Vegetarianism, and the lactose-intolerant who wish to avoid dairy products (products that are reliably certified as pareve meet this criterion). The Orthodox Union, one of the largest kashrut organizations in the United States, claims that "when positioned next to a competing non-kosher brand, a kosher product will do better by 20%".
Society and culture
Adherence
Many Jews partially observe kashrut, by abstaining from pork or shellfish or by not drinking milk with meat dishes. Some keep kosher at home but eat in non-kosher restaurants. In 2012, one analysis of the specialty food market in North America estimated that only 15% of kosher consumers were Jewish. Kosher meat is regularly consumed by when halal is not available. Muslims, , and people with allergies to dairy foods often consider the kosher-pareve designation as an assurance that a food contains no animal-derived ingredients, including milk and all of its derivatives. However, since kosher-pareve foods may contain honey, eggs, or fish, cannot rely on the certification.
Differentiations in practice
"Kosher style" allows for variation in adherence to kashrut, reflecting different practices within the Jewish community. For some, kosher style implies abstinence from non-kosher animals, like pork and shellfish, and the avoidance of mixing meat and dairy in meals. These individuals may consume meat from animals that are kosher but not necessarily slaughtered according to kashrut standards.
Linguistics
Etymology
In Biblical Hebrew the word kosher () means be advantageous, proper, suitable, or succeed, according to the Brown–Driver–Briggs Hebrew and English Lexicon. In Modern Hebrew it generally refers to kashrut but it can also sometimes mean "proper". For example, the Babylonian Talmud uses kosher in the sense of "virtuous" when referring to Darius I as a "kosher king"; Darius, a king (reigned 522–486 BCE), fostered the building of the Second Temple.Tractate Rosh Hashanah 3b, Schottenstein Edition, Mesorah Publications Ltd. In colloquial English language, often means "legitimate", "acceptable", "permissible", "genuine", or "authentic". The word kosher can also form part of some common product names.
Kosher salt
Sometimes kosher is used as an abbreviation of koshering, meaning the process for making something kosher; for example, kosher salt is a form of salt with irregularly shaped crystals, making it particularly suitable for preparing meat according to the rules of kashrut, because the increased surface area of the crystals absorbs blood more effectively. In this case the type of salt refers to kosher style salt. Salt may also be kosher certified salt, or both. Certified kosher salt follows kashrut guidelines. Sometimes the term "coarse kosher salt" is used to designate salt that is both kosher style and kosher certified. The term "fine kosher salt" is sometimes used for salt that is certified kosher but not kosher style.
Pickles
Kosher can occur as a synonym for Jewish tradition; for example, a kosher dill pickled cucumber is simply a pickle made in the traditional manner of Jewish New York City pickle-makers, using a generous addition of garlic to the brine, and is not necessarily compliant with the traditional Jewish food laws.
Strictness degrees
Mehadrin
Mehadrin is a term most commonly used with the meaning of enhanced or stricter kashrut rules. "In Israel, what is the difference between l'mehadrin and badatz" at "Mi Yodeya", 7 December 2009. Accessed 23 October 2023. Its etymology is still debated, "mehadrin and hadran" at "Balashon: Hebrew Language Detective", 7 December 2009. Accessed 23 October 2023. but its initial halachic use related specifically to lighting candles on Hanukkah. "Chanukah: Mehadrin – An Understanding of the Concept", by Rabbi Yehudah Prero for Torah.org. Accessed 23 October 2023. Later it became widely used in regard to dietary laws, and ended up loosely covering almost every aspect of Jewish observance "Mehadrin Is Relative" by Mordechai Schmutter for the "5 Towns Jewish Times", 21 September 2023. Accessed 23 October 2023. (see mehadrin bus lines).
Badatz
Badatz is the Hebrew acronym of Beth Din Tsedek and is used as a name for organisations which supervise the production of kosher foods. They typically only certify mehadrin-level products, but are not the only agencies specialised in applying enhanced mehadrin rules, since there are non-badatz agencies also doing so.
Suriname
A treef (Surinamese Dutch, derived from Sranan Tongo trefu) is a food taboo.
In Suriname certain groups of people have long adhered to belief in treef, especially among people of African descent. The consumption of certain foods is prohibited, in the belief that it could cause major diseases, particularly leprosy. These prohibitions can vary individually, but it is inextricably related to conditions in the family. A treef is inherited from the father's side, but it can be revealed in a dream, often by a woman. In addition, a woman must take into account special food taboos during pregnancy. There is great importance attached to the treef; if a child observes the treef of his father, and yet experiences a skin condition, this is seen as a strong indication that the child was begotten by the woman with another man. Finally treef also be acquired later in life by wearing certain charms that compel you to abstain from certain foods.
Other uses
Although the term kosher relates mainly to food, it sometimes occurs in other contexts. Some Orthodox retailers sell Kosher phone—stripped-down devices with limited features.
See also
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