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

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impure animals: present, future, past

The verses in Vayikra 11:4-6 gives 3 examples of different impure animals which don't have split hoofs, namely: the camel, the 'hyrax' (shafan) and the hare. An interesting thing I once noticed is ...
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729 views

Working in a non kosher yogurt store

I was asked a question this afternoon and I don't know a good answer (yet) so I'm posting it. I have been asked in the past whether a Jewish person may work in a non-Kosher restaurant that serves ...
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1answer
229 views

Easiest way to determine if something is “Chametz” or permitted for Passover?

A friend of mine runs a catering company that does do business with a sizable group of Jewish people. Around this time of year she gets requests to be 100% Passover Kosher of course. This often ...
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118 views

Problems with the kashrut of todays machine matzot

I read a disturbing article by Rav Menahem Eizenberg in Techumin (26, page 123). The one of the many issues raised in the article is that the hechser for machine mazah does not apply to today's ...
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149 views

The Manna and non kosher taste

The Gemarah in Yoma 75a explains that the manna imparted all flavors except five flavors. Based on this idea, can one have in mind the taste of pork while eating the manna, or do we say that anything ...
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3k views

Is Guinness Beer no longer kosher?

A new Smithsonian article has discovered Guinness Beer's use of isinglass, a technique that Guinness Beer has confirmed that it does to the Huffington Post, and even declared "Guinness Black Lager is ...
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619 views

Using a non-kosher toaster oven

What is the permissible way to use a non-kosher toaster oven? My thought process was that, when cooking milk in a meat oven, the covering of the dish and the rack makes it acceptable. Would covering ...
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1answer
273 views

Can my non-Jewish co-worker bring me coffee from the corner cafe?

Assuming coffee is Kosher, would it be alright if my non-Jewish co-worker brings me coffee on a trip to the corner cafe? May I assume that the co-worker indeed purchased a Kosher item and has not ...
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2k views

Why aren't any of the main American brands of chewing gum kosher?

These days, you walk into any American supermarket, you can find kosher chocolate bars, kosher jelly beans, kosher all sorts of stuff. I understand why the gummy worms aren't kosher, they contain ...
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102 views

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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801 views

Koshering granite

I have been told that a granite counter top is similar to glass in that it is not porous and does not absorb taste from food that touches it. Is there a source in halacha for this concept? What other ...
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175 views

Opened “please-take!” food items in a non-Jewish workplace

Is it alright to consume unsupervised food items at work that are open and available to anyone, assuming the items were initially known to be Kosher1 and there's no evidence of tampering? Items that ...
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336 views

Can jews eat unclean animals when blood is removed?

http://www.mechon-mamre.org/p/pt/pt0512.htm Notwithstanding thou mayest kill and eat flesh within all thy gates, after all the desire of thy soul, according to the blessing of the LORD thy God ...
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2answers
109 views

What makes something “worthy of being honored”?

When a piece of meat is in a mixture that should nullify it, we don't consider it nullified if it is ראוי להתכבד, or "worthy of being honored", something you would serve to a guest. Is there some kind ...
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1answer
85 views

Efshar LeSoḥato Asur - because or even though?

I'm trying to comprehend the concept of "אפשר לסוחטו אסור" (roughly: "if it's possible to extract it - something prohibited from something otherwise permitted - it is prohibited"). As far as I can ...
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2answers
743 views

In what way is kosher chicken different from brined chicken?

Over on Seasoned Advice, there have been a number of questions related to the nature of kosher meat and the amount of salt absorbed by the meat. Most recently, In what way is kosher chicken different ...
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1answer
240 views

How does Kavush work?

The Halachic principle of Kavush states that leaving something in liquid for 24 hrs transfers taste, and therefore it alters the status of the thing with which it is exchanging tastes. However, ...
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3answers
195 views

One-in-Sixty Versus Roiv- Why both?

There are two concepts in the Halacha of Bittul (nullification). One says that if there is an item that is Unkosher that falls into another item that is Kosher, and it is a mixture, and the Unkosher ...
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1answer
95 views

Sharpening a knife as Ne'itzah/Kelipah

Can sharpening a knife be done as a form of Ne'itzah for removing a Kelipah for Kashruth concerns?
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39 views

Sharpening a knife as N"T [duplicate]

Is sharpening a knife a concern of Nothein Ta'am in Kashruth matters?
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1answer
245 views

Status of plastic drip coffee filter cone

What would be the status of the coffee maker cone shown below if it were to be used to make a cup of coffee in a dairy mug? Would it become dairy? Would it remain parve? Here's how it works. It ...
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1answer
152 views

Jewish Person Selling Non-Kosher Product

At a local convenience store near my work, they stock all sorts of non-Kosher products. However at the cashier's desk is a guy obviously orthodox Jewish (Curls down from the side, Black Clothing ...
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215 views

Eating treif under hashgacha

What happens if someone eats at a restaurant with a kosher certification (hashgacha) but is served, and unknowingly eat non-kosher? What are the spiritual and halachic ramifications to all parties ...
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1answer
107 views

Are preservatives called a “davar ha'mamid”

At the end of YD Siman 87 we find the dinim of "mamid". Over there it's speaking about cheese made in the skin of the kevah of a nevilah of treifah. The Rema explains that because it is an issur for ...
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255 views

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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2answers
166 views

Shechting non-Kosher animals

The question was asked: If someone for example is sick and must eat from a non-kosher animal. Must it be shechted (slaughtered) first like a kosher animal? I don't see any reason why it should, since ...
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299 views

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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Halachic Considerations for Women in the IDF

For a religious girl going into the IDF very soon, there are a few questions that are often asked: Especially in active units, wearing a skirt while on base can be a problem: While crawling, ...
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The stolen maple syrup and kashrus

Does anyone know if there is going to be a kashrus problem with maple syrup next year? A rather large amount of maple syrup was stolen last year. The thieves did not keep it in the original casks, ...
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1k views

Is it permissible to use a Hotel's Drinking Glasses?

Is one allowed to use the glass cups provided by a hotel (usually in the bathroom) for drinking? Or is there a Kashrus problem?
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1answer
177 views

What is “blood that moved from one place to another”?

I'm learning laws of salting in the Shulchan Aruch. One concept I'm battling to understand is "דם שפירש ממקום למקום" - blood that moved from one place to another. Here's a good example of my ...
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3answers
607 views

Is Pork, Camel, and the like Fleishig?

If one somehow consumed meat of a non-kosher species such as camel or pork (e.g. life-threatening illness, or by accident), does s/he become Fleishig? Why or why not?
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Why aren't Yemenites an ed echad on locusts?

I've heard that the reason we (most of us) don't eat the locusts enumerated as kosher in the Torah is that we cannot identify them. That is, we don't know what type of locust is referred to by the ...
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1answer
437 views

How does one keep a kosher sink?

How does one keep a sink kosher when using two separate sets of plates and dishes?
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259 views

Trustworthiness of “new” dishes

When one buys new dishes from a store (e.g. cutlery, plates, bowls), is there any concern that they are not as "new" as they are claimed to be? For example, someone buys some cutlery and plates, ...
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2answers
108 views

Dried insects - permissible?

I just read the website of a Kashrut inspection agency with which I'm familiar, but only insofar as I have seen it many times and tried, but failed, to find any information about the agency's ...
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115 views

Kashrut: Meat and dairy

My family owns a farm that produces fresh food, including dairy and meat. Would the prohibition to eat milk and meat together still apply since I have ascertained that the cow from which milk was ...
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1answer
117 views

Why is Kosher important?

Why is Kosher important to Jewish people? It is not necessarily healthy food from what I can see.
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534 views

Can Jews eat non-Kosher meat?

Is it permissible for a Jew to eat meat that isn't treif or forbidden flesh if it was not purchased from a kosher butchery? I was told by a Muslim friend of mine that non-halaal meat (except pork) ...
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1answer
145 views

Does a Chalav Yisroel milk bottle help?

There are many stores out there (e.g. Coffee shops) that have a hechsher, but are Chalav Stam. To get around this issue, some of these stores offer the option to request Chalav Yisroel milk for those ...
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2answers
2k views

Why assume coffee is kosher

Why can it be assumed that coffee from coffee shops is kosher? Why couldn't the equipment become unkosher through exposure to non kosher ingredients or when being cleaned? For example the Canadian ...
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1answer
530 views

Is human flesh a kosher food?

Is human flesh a kosher food? Please provide both modern and classical sources.
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3answers
987 views

kashrus of mouthwash, toothpaste, lip balm

What are the halachic and factual issues involved in, and various rabbis' holdings on, whether flavored mouthwash, flavored toothpaste, and flavored lip balm need to be kosher, or need a hechsher ...
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4answers
209 views

Comprehensive list of Kosher Products

Is there a comprehensive list on the web of all kosher products?
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878 views

A site to search Kosher Symbols by characteristics?

Several years ago, I found a website that let me search and sort Kosher symbols by look and other characteristics. It seemed like each symbol was tagged with its distinctive features. This was very ...
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2answers
280 views

Synthetic unkosher meat?

Suppose tissue identical to that of a pig could be created synthetically (with kosher ingredients) in a science lab. The meat would be completely indistinguishable from pig meat, but it would never ...
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1answer
43 views

Is Ever Min HaHai a Nevelah?

Does Ever Min HaHai have a Din of Nevelah? Does it render food cooked with it Nevelah? If it's meat from a Behemah Tehorah would it be Asur to cook with milk?
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2answers
171 views

Does it make logical sense to “not hold by OU kashrus”?

Apparently there are some people who do not rely on the OU for kashrus. I have seen a few online references (i.e. this Matzav post) that claim this makes no logical sense, since virtually every other ...
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Fish eaten with milk?

Is there any halachik problem with eating fish and milk together? (A classic example is a bagel with lox and cream cheese)