Kashrut (also kashruth or kashrus, כשרות or כַּשְׁרוּת) is the set of Jewish dietary laws.

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What defines a non-kosher restaurant for purposes of maarit ayin?

There is a known halacha that one shouldn't eat in a non-kosher resteraunt due to Maaras Ayin, even though they serve kosher food also. What defines a non-Kosher restaurant? McDonald's is probably ...
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Where is the story of the medieval rabbi who ruled a fish was non-kosher because of his dream?

If I recall correctly there's some fish whose kosher status is questionable; a medieval rabbi (Rishon) ruled it was okay, then had a dream that night where all his students were sitting around and ...
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Any information about Rabbi Barnett Hasden's “Ner Tamid K” hechsher?

Does anyone here know anything about the reliability of "Rabbi Barnett Hasden of Ner Tamid K in Staten Island, NY"?
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Who certified this yogurt as kosher?

Looking at unclear heshers on some yogurt packages: Dannon "Light and Fit" yogurt has a capital K without any other identifier. Yoplait "Light" has a capital K D. I was told that the letter K alone ...
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what is kosher meat?

I have heard different theories about Kosher foods, such as They sacrifice animal in a proper way They recite God's name when sacrificing the animal They only eat front limbs of animals. The rear ...
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Can an immersion heater be used to kasher a sink? Does anyone have experience with this?

Normally, to "kasher" or "kosherize" a metal sink (from non-kosher to kosher, or before Passover), you clean it out well, make sure it's used for nothing hot for 24 hours, then pour boiling water all ...
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Can a mother taste her own breastmilk?

Can a mother drink/taste her own breastmilk? I know theres an issur to for a non baby to drink directly from the breast- but what about from a cup? Further- if it is indeed assur even from a cup- ...
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What Kashrut Agency Uses this Symbol?

I found this symbol on a box of chocolates today: It was on a box of chocolates from this company - http://www.hauserchocolates.com. Anybody recognize the agency?
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Why isn't eating milk with chicken kosher?

I remember learning that the reason you don't eat milk with beef is because you shouldn't cook a calf in its mother's milk. However, when you are dealing with two different species, this same logic ...
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Who or what is OV? (kosher symbol)

In the store earlier, I saw a kosher symbol I had never seen before, and was wondering if anyone here knows what organization it represents. Here is the symbol: [ What is odd is that it looks like ...
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Milk and Meat of Non-Kosher Animal Species

Is cooking milk with the meat of non-kosher animal species the same problem as cooking milk with the meat of kosher animal species? In other words: can a Jew cook milk with a non-kosher animal ...
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“Blias” in today's pots and pans

Throughout all of Yoreh Deah Chelek Alef and Hilchos Pesach (and perhaps other places in Shulchan Aruch as well) we see the idea of "blias" ("absorptions") by celim. That is to say there is a "taste" ...
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Is it permitted to lick the adhesive on an envelope?

While most stamps are now self-adhesive, most envelopes still require moistening the adhesive in order to seal it. Is it a kashrus problem to lick the envelope's adhesive?
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What possible Kashrus concerns may exist with these vitamins?

Recently my child's Doctor prescribed vitamin drops for my infant son. When I went to the pharmacy to fill the prescription the pharmacist said that the vitamin drops prescribed are Treif, and the ...
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Powdered Milk - Chalav Yisroel

I have a child with a milk allergy. He will be undergoing a "baked milk" food challenge shortly. For this I need to bake him muffins with powdered milk. I have found several brands of kosher powdered ...
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Timing of the Commandment of Gid Hanashe

The Torah mentions, after the story of Yaakov getting injured in Parshas Vayishlach, that we do not eat the Gid Hanashe for this reason. The Meforshim seem to concur that this mitzvah was included in ...
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How does shechita (kosher slaughter) actually work?

If I understand correctly, the classical Halachic requirements on kosher slaughter only discuss cutting the trachea and esophagus. Is that enough to kill the animal quickly (and painlessly?) What ...
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Is aged beef salted and soaked before or after the aging process?

Some kosher butchers are now offering aged beef. Is this meat salted and soaked before or after the aging process?
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Can you kasher earthenware or porcelain utensils?

I read in the Kitzur Shulchan Aruch of the Yalkut Yosef that if one cooked dairy in a earthenware meat vessel, and if the vessel is valuable, then one can perform hagalah on the vessel three times ...
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Brands of KFP peanut butter in the US

Does anyone know which brands of peanut butter are Kosher for Passover in the US? Alternatively, I have heard that there is a list for Sepharadim of KFP products that contain Kitniyoth. Can someone ...
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tuna wrap in non-kosher restaurant

Is there any way to eat a tuna wrap from a non-kosher restaurant, if I have full access to see their ingredients and packaging?
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How can yeast be kosher lǝPesach?

I was once reading the ingredients on a pack of Bissli (with a Pesach hashgacha) and saw that it contained yeast. How can this be?
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toveling racks from new built in wall oven

If someone is having a wall oven installed, should the racks that come with the oven be toveled as a separate item? Note that racks of this type can be removed from the oven.
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Noachide Dietary Restrictions

Noachides are not commanded to keep Kosher but we do know the sixth commandment given us is "The prohibition of eating flesh taken from an animal while it is still alive" can someone clarify (Not give ...
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Confectioners glaze - non alcoholic

Recently I read an article by Rabbi Yirmiyohu Kaganoff regarding confectioners glaze. Confectioners glaze is manufactured from shellac, "a glandular secretion of the lac insect, Kerria lacca, a ...
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Unsupervised meat and closed restaurants/butchers

How does Basar SheNith'alem Min Ha'Ayin (meat that has disappeared from view) apply vis a vis restaurants/delis/supermarkets/butchers that have closed for the night/weekend/holiday? I was just ...
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Can meat ever be both “treifa” AND “neveila”?

I'd always assumed that if a cow died of any cause other than proper shechita (kosher slaughter), the meat is neveila. If it died by kosher slaughter but had already been seriously injured or ...
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Buddha at Indian Restaurants

Is the Buddha statue (or Hindu statues) a problem at Kosher Indian restaurants? (This is different than the cat question since the cat is only a good-luck superstition and these are actual idols)
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How to identify Yashan

I would like to serve food to a friend who observes the restrictions against eating Chadash grain products, but I don't have access to a guide on identifying Yashan. However I have heard, for ...
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Do hechshered leafy vegetables mean that they have no bugs?

If I buy (for example) frozen broccoli in the store with a hechsher, is it required to check for bugs? Does the hechsher signify that the vegetables have already been checked for bugs and are free of ...
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fruit-flavored tobacco Kashrut

Do the fruit-flavored tobaccos that are widely used in hookahs require a Kashrut certification similar to foodstuffs? If yes, why; if not, why not?
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What are the kashrut standards of the various nationwide (and regional) kashrut agencies?

I'd like to see a resource developed which transparently compares the standards of the various kashrut agencies. Just like I can retrieve an incredibly in-depth comparison chart from Wikipedia ...
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Permissibility of making Matzah by frying

Does anyone know of an opinion permitting Matzah to be cooked in a skillet(instead of being baked in an oven), and if so under what circumstances?
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Reliance on non-Jews for removing bugs

In discussing washing salted meat according to Halachah, there is a lengthy discussion about whether and when we can rely on a non-Jew who claims to have done it. The Tur (Y"D 69:10) says that there ...
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Kashrus Book in Hebrew like Shemiras Shabbos k'Hilchasa

Does anyone know of a good book on kashrus (in Hebrew) that accomplishes for kashrus something similar to what Shemiras Shabbos k'hilchasa does for Shabbos?
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At what point was it recommended to have a separate kosher certifier (mashgiach) for local Jewish businesses?

If I understand correctly, you can generally walk into an observant Jew's house (upon invitation) and if he says the food is kosher, you assume the food is kosher. Now if the same fellow has a kosher ...
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Buying non-Kosher food for home Emergency Kits

The United States federal government, American Red Cross, and surely countless other governments and NGOs recommend that families have Emergency Survival Kits in their homes in case of a natural or ...
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Fresh fish need hechsher

Does fresh fish from a supermarket or fish market require a hechsher? I would be tempted to believe that a fish known to be of a kosher variety would not need certification since there is no shechita ...
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Is Rum Kosher for Passover?

Specifically, is Bacardi Superior Original Premium Rum kosher for Passover? The label doesn't say so, nor does it say that it's kosher in general for that matter, but since it has a sugar base, ...
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Do multiple hechsherim (kosher symbols) on a product make its kashrut less reliable?

A former rebbe whom I highly respect advised me not to eat any food product that has more than one kosher certification on it. His thinking was that in principle, the concepts of kashrut and achdut - ...
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Comprehensive list of Kosher Products

Is there a comprehensive list on the web of all kosher products?
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Why keep Kashrut?

Is there a known reason for keeping kashrut or is it a set of guidelines proposed by sages who we respect and don't question the logic behind? Is there anything in the Torah that suggests kashrut?
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What other work can a mashgiach do in a kosher restaurant today?

In a kosher restaurant today, must the mashgiach (kosher inspector) spend 100% of his time watching everything, or can he do some other work in the restaurant? How much work? I know this may vary ...
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Does soda need a hechsher?

I have noticed that many cans of pepsi don't have a hechsher (kosher symbol) on them. Do they need one?
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Is the Halachic concept of taste transfer accepted by scientists and chefs?

Halacha (Jewish Law) tells us that when food is cooked in a pot, that pot absorbs the taste of that food (to what degree is impossible to know). When that pot is then used to cook something else, the ...
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What are all the different koshers for/about?

I found out recently that what I had been thinking of as a "food copyright symbol", (U), is actually a statement of kosherness. Now that I know what this is, I'm starting to see different symbols like ...
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Is human flesh a kosher food?

Is human flesh a kosher food? Please provide both modern and classical sources.
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Does consuming raw meat make one Fleishigs?

If one is making meat, and while the meat is still raw licks his/her fingers, does s/he become Fleishigs (to wait the appropriate amount of time before eating dairy)? Essentially if we boil (excuse ...
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Does cooking kitniyot in a pot render it non-kosher-for-Passover for Ashkenazic Jews? If so, why?

I've heard of cases where a Sephardic family, for whom rice is totally kosher for Passover (assuming it's checked and contains no additives etc.), cooked rice in a pot. The next day, they invite their ...
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Coffee Machines in Hotels

Many hotels have coffee machines in the rooms. They also usually provide the necessary ingredients, such as disposable filters and coffee grinds. What are the potential problems with using such a ...