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

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Is non-kosher-dyed food kosher?

Supoose some non-slaughtered-animal or non-kosher-species ingredient gets mixed accidentally into a larger food. From what I understand, if the non-kosher ingredient is not thought to add flavor to ...
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Source for requirement of 3rd party hechsher? [duplicate]

When you eat another Jew's food, you are entitled to rely on him for the kashrus of the food. By that reasoning, if he opens a restaurant, and you know him to be Yarei Shamayim, you shouldn't need ...
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Is there a problem with eating Gummy Bears and Meat together?

Most kosher gummy bears (and other gummy candy) that I have seen contain fish gelatin. Since there is a warning in the Shulchan Aruch against eating fish and meat together, does the same apply to ...
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Can a Jew borrow a cup of sugar from his non-Jewish neighbor?

I'm not specifically asking about stealing and owing concerns, although those may also be of interest. My question is actually: Can we use kosher-labeled ingredients from a non-Jew's home? (I ...
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How many degrees of separation from food does one have to kasher?

I understand that the sink, the dishwasher, and sponges, etc. all need to be kashered, presumably because they touch things (plates, utensils) that also touch food. But how many degrees of separate ...
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What rules need to be followed in order for a non-Jewish professional chef to cook Kosher food for a Jewish customer?

I'm a non-Jewish professional chef in a restaurant, and I am marginally aware of kosher dietary restrictions. I know that the food itself, as well as the pots, pans, and other utensils used in ...
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Is it against Kosher law to combine poultry and cheese? [duplicate]

As I understand it, the prohibition on mixing meat with cheese is based on the commandment against "seething a kid in its mother's milk". Since poultry are birds, and birds don't produce milk, is it ...
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10 second rule for food on ground [duplicate]

Throughout the secular world I've heard the expression "10 second rule" whenever a piece of food has fallen to the ground (and someone still wants to eat it). The 10 second rule permits the food to ...
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Is a bottle or jug of 100% pure maple syrup kosher without certification?

There are several farmers' markets scattered around the New York City area. Many of them carry bottles or jugs of 100% NY State or Vermont maple syrup. Occasionally I find Canadian maple syrup. (For ...
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Can a Jew work in non-kosher food warehouse?

Can a Jew work in non-kosher food warehouse? I mean to lift boxes from one place to another, to load pallets filled with boxes of non-kosher stuff. My question is about specific warehouse where there ...
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Kashruth Issues with Dog Food?

If someone is keeping a vegetarian/milk household, and then they acquire a dog that eats meat based dog food products, what potential Kashruth issues might arise? Would there be difference in Kashruth ...
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Do Whole Vanilla Beans Need A Hekhsher?

Vanilla beans and their derivatives are commonly used in many dishes as a spice. The whole beans are available for purchase in stores and online. I understand that plain fruits and vegetables (when ...
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What qualifications are necessary to become a mashgiach?

I had thought that mashgochim (kosher kitchen supervisors) had to have semikkha or darn close. But people have been telling me that all you need to do is "know the laws" of kashrus, which they seem to ...
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Is there a concern regarding the kashrut of microorganisms?

Since I have seen many religious people drink fresh spring water, I assume that there is no concern regarding the kashrut of microorganisms in the water such as hydra and paramecia, among other ...
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Questions about eating Kosher

Is the main considerations on what meat is Kosher made public in Leviticus 11 or is there other Jewish sources that may give further illumination on what food is considered kosher? Also is there ...
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Why were birds considered to be flieishig (meat) but not fish?

I am basing this on what I had heard in yeshiva a while ago, so I don't know the exact source of the reasoning. My understanding is that according to the Torah, birds (poultry) were considered parve ...
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Could a Ben Pekuah make all cattle not eligible for Shechitah?

According to the Simlah Chadashah, the definitive work on Shechitah, a Ben Pekuah does not need Shechitah on a Torah level however the child of a Ben Pekuah and regular animal would not be eligible ...
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Kosher nicotine replacement therapy?

I've tried to quit nicotine cold turkey and find it difficult. Are there any replacement therapies -- such as nicotine gum or lozenges -- that are kosher? Aside from possible kashrut issues, are ...
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Can one Shecht with a Wire

Can one ritually slaughter with a wire? Why or why not? The Talmud says that any implement may be used, so according to that a wire would be fine. Are there any technical problems that would ...
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Ben Noach give a non-religious ben Yisrael non-kosher food?

If a ben Noach invites a non-religious ben Yisrael to his home for Torah study(let's say they study the seven laws of Noach together) and the ben Yisrael gets hungry, and he's going to not eat kosher ...
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Can a Jewish actor participate in a pie-throwing scene that uses non-kosher pies?

For those younger readers who may be unfamiliar, (call me an "A.K." if you wish) pie throwing was a common comedic scene and activity in several movies and T.V. skits such as The 3 Stooges (nyuk ...
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Are “Kosher Salts” Kosher?

Is "Kosher salt" supposed to be understood as certain salts that adhere to the Jewish religions dietary restrictions? I'm curious if this is so what about salt can make it kosher or non kosher?
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Should a Va'ad revoke kosher certification of caterers that allow catering a gay marraige affair? [duplicate]

Related and a follow up to this M.Y. question: The U.S. Supreme Court has legalized gay marriages in al states. There have been several publicized law suits in a few states where a gay couple sued a ...
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Is it permitted to eat boogers?

I apologize for the question. but is it permitted to eat ones boogers? possibility of blood? is it Baal Teshakzu? totally permitted similar to nail biting? and would it be forbidden on shabbos?
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Are these cookies kosher?

These cookies have no certification on the box itself, it is made in a spanish speaking country. yet they have a sticker with a kosher certification put on them. is this reliable? This is not a ...
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ka-kosher legit?

I want to know if anyone knows or anyone can help me determine if: ka-kosher as presented at ka-kosher.com is a legit (orthodox) kosher certification. I noticed the symbol on a bag of frozen organic ...
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When do dietary supplements need a hechsher?

I am looking to purchase a probiotic supplement (http://www.amazon.com/gp/aw/d/B003THZ06A?vs=1, ingredients: ...
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A kohen who marries Gerusha as Mashgiach

Is a Kohen who marries a Gerusha(divorcee) but is observant in Shabbos and Kashrus allowed to be a Mashgiach?
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Does eating a parev item cooked in an oven with meat make you meaty?

If I cook (e.g.) roasted vegetables in an oven whilst at the same time cooking a chicken in a different shelf, would eating the roasted vegetables render me meaty? There are several factors that need ...
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Do drugs need to be kosher? [duplicate]

Specifically, does it matter if medication comes in gelatin capsules? Is there a difference what the medication is?
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Swallowing fingernails

Although it is permitted to bite ones nails, and is not considered uncouth as is stated in Moed Koton (18a): אמר רב שמן בר אבא הוה קאימנא קמיה דר' יוחנן בי מדרשא בחולו של מועד ושקלינהו לטופריה ...
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Length of time for waiting for hard cheese proportionate to the length of time it was aged

In a Halachic pamphlet I saw before Shavuos this year, it mentioned an opinion that one must wait after eating hard cheese one hour for every month it is aged (so if it was aged three months, three ...
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Source for hechsherim [duplicate]

Who was the first rabbi or beis din to establish a kashrus organization? I know according to the gemorah, chazaka is enough if the owner is yiras shamayim. Was there ever a takonah established ...
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How much aged cheese is needed in a cheese mix to require waiting 6 hours?

According to Remo in Shulchan Aruch Yorah De'ah a9:2 as referred in this OU article, people should wait 6 hours after eating hard cheese. Let's say someone eats a type of cheese that is partially ...
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Cholov Yisroel “Kashered”

So I was eating one of my favorite meals -- a bunch of peanut butter and cheese sandwiches, and to pass the time, I looked at the package of cheese. It is "Natural and Kosher" by Anderson ...
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Can non-biological matter cause your sink, dishes, or food to become non-kosher?

For instance, if something non-edible such as a chemical or eraser shavings are drained down the sink, would that cause any kashrut problems?
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Using Dishwashers for both Meat and Milk

Can one use a dishwasher to wash both meat and dairy dishes, either simultaneously or consecutively? What about pareve dishes?
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Sources about the Kosher status of Royal Jelly

Royal Jelly ("a glandular secretion and its color is a whitish yellow. Its consistency is creamier and less viscous than honey. Its taste is bitter, although not offensively so.") according to this OU ...
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Eating bread/pastries from a non-Jewish baker

There are various commentaries that allow eating pat paltar, see here and here for a more extensive discussion. Going with the opinion that pat paltar is allowed what questions would one have to ask ...
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Is it halachically permissible for a Jew to own a casino?

For the purpose of my question, assume that the modern casinos have games which, on average, favor the house. They don't win every spin of the roulette wheel, nor every throw of the dice, but the ...
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Issur Sefichin on Otzar Beis Din produce

The Sages were concerned that individuals would plant vegetables in the seventh year and claim that these had grown by themselves. They therefore forbade consumption of Shemitta vegetables where the ...
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What's the way to check a mushroom for worms

Is there a way, and if so, what's the best practice for checking a mushroom to verify it is clear of worms?
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Dyo lesafrut - mutar beficha or not

I came across a thread today on the International Sta"m Forum. In the comments, some of the sofrim who frequent the site were debating whether sofer's ink, or dyo, need be mutar beficha (permitted to ...
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Do Strawberries acquired from a supermarket require washing to be kosher?

This question comes from someone who's interested in preparing and selling food items with strawberries as a main ingredient. In a scenario where many strawberries are being used at once, would each ...
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When koshering meat by roasting can I put pepper

What are the Ashkenazi and sifardi customs when kashering meat by roasting if it is permitted to use salt and/or other spices?
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Roasting unsalted meat

What are the customs in the process of making meat edible by removing the blood through roasting? Specifically after the roasting do I need to wash the meat to eat it (not to cook it afterwards)? ...
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Can one buy lettuce and cabbages, etc. from a non-Jewish produce store?

I have noticed that some non-Jewish owned produce stores in U.S. have someone trimming the rotten or ugly leaves off the edge of lettuce, cabbage and other similar leafy vegetables. The knife used is ...
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Restaurants with hechsher for locusts

Are there any restaurants in Israel (or other) that have a hechsher endorsing the preparation and eating of locusts in their restaurants?
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Does baby toothpaste need a hashgacha?

According to Rav Yisrael Belsky (and based on the reasoning of Rav Yaakov Kaminetsky) toothpaste which contains non-kosher ingredients (such as animal-derived glycerin) is only kosher when the ...
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does a water bottle become fleishig from a meal?

If I drank from a water bottle during a meat meal, does it become meat? Basically, if I drink from the same water bottle a few hours later, do I need to wait six hours again?