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

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Seared Sushi Bishul Yisroel

Certain Sushi require the searing of the fish on the outside. Does this process require a Jew light the torch used to do the searing or is it not required? I have seen that some stores do and some do ...
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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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145 views

Possibility of buying treyf meat in a kosher store

Since meat may be sold to a consumer before kashering and traiboring, it is possible that parts of meat obtained from a kosher store may not be kosher.* Ordinarily, one could guess whether the meat ...
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111 views

How do we know that commercial fruit is not orlah/neta revai?

According to Judith R. Baskin (Cambridge Dictionary of Judaism and Jewish Culture, 2011, pp. 134-135), "The biblical law of "uncircumcised" fruit (orlah) prohibits consuming fruit picked from a tree ...
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623 views

Can you give an animal a tranquilizer, and proceed to slaughter it?

Can you shoot an animal with a tranquilizer, or feed a tranquilizer to an animal, and proceed to slaughter it in a kosher manner?
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Biologically, what are sirchos?

Biologically, what are Sirchos? Are they a Tumor?
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Medjool Dates (bugs?)

We have a 2 lbs box of medjool dates. Very fancy. But it has been on the shelf for about 2 months. At first, when we split it, no visible bugs. Now we are seeing small white spots near the seed, salt ...
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134 views

Should a Jewish cashier scan treif items?

On the basis of Vayikra 11:8, is it permitted to work as an employee at a grocery store as a cashier (not the owner of the business), which would entail touching packaged yet non-kosher food items ...
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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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681 views

Does every thing need a hechsher?

Do objects used in food preparation and foods that have no or little chance of being not kosher really need a hechsher? Please cite sources, if you can.
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Kashrus Explained

A close friend of mine asked me to fire this question at the mi.yodeya community so here goes: "I came across this rather interesting rendition of "kashrus Explained", not sure who authored it, but I ...
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207 views

Why would a product be “only for cooking and pureeing”?

A recent OU kashrut alert that I found on Kashrut.com says: Kirkland Nature's Three Berries: Rader Farms, Inc.: This product bears a Half-Moon K symbol and should be used only for cooking and ...
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Does MSG require a hechsher?

Monosodium glutamate (MSG) is a popular food additive that lends umami (savory) flavor. Do pure MSG crystals require a hechsher?
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Does the one-year rule regarding Milchig and Fleishig pots apply to non-Kosher vessels?

According to Ashkenazi tradition, "If a meat/milk pot hasn't been used for a year+, it may be used as the other type without Kashering". If I have a ceramic coffee mug that may or may not have ...
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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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Why separate verses for the camel, hare, and hyrax?

In vayikra 11, we're given an overview of the kosher and non kosher animals. Among mammals, it singles out four as explicitly non kosher: the pig for only having split hooves, and the camel, hare, and ...
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Starburst Fruit Chews kosher?

Are Starburst Fruit Chews kosher? This website below clearly has an OU on the right side. However, Gelatin appears on the ingredient list, and the oukosher.org website doesn't have any reference to ...
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157 views

Does soy milk need a hechshir

Does soy milk need a hechshir since they put in artificial things that can be trayf or its all natural and it won't need a hechshir
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Can a hot water urn that is used throughout the year be used for Passover?

Can a hot water urn that is used throughout the year be used for Passover? If not, what is the reasoning why, if it is only used for water (i.e., not coffee). Would the same reasoning hold for a ...
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151 views

What is the problem with non kosher rennet

Before I begin my question I need to explain specifically what and how rennet is made. Rennet are enzymes scraped from the stomach of an animal, and is used to help give cheese it's texture. So my ...
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179 views

Throwing out food with “questionable” hechsher - bal tashchis?

If one receive cooked food from a person that perhaps used ingrediants from a hechsher that one normally wouldn't eat is it bal tashchis to throw out the food? With packaged, store-bought food it ...
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164 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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460 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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“Safe” Foods in Non-Mehadrin Situations

Given the fact that both Mehadrin and Non-Mehadrin exist, what are foods that can be safely eaten in non-mehadrin places? I.e. they would not be problemaic. (also, assuming Shemittah is not a ...
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Are there any brands of mustard powder (flour) that are kosher for Passover for Sephardim?

Prepared mustard (containing vinegar and the like) is certainly not kosher for Passover. According to Ashkenazic practice, the mustard plant itself is included in "kitniot" and prohibited on ...
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What are the alternate signs for a kosher fish?

In addition to the signs for a kosher fish mentioned in the Torah, The Tur (Y.D. 83) brings alternate kosher signs for fish that are not accepted by all Poskim. Namely, the head of a kosher fish is ...
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do blanched, slivered almonds need a hechsher?

I have seen blanched, slivered almonds sold in packages. Hypothetically do these need a hechsher? I am aware that blanching involves heating so I imagine there could be kashrut concerns, but on the ...
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184 views

Can you french kiss your wife if she does not eat Kosher?

Is there any kashrut problem to kiss your wife if she has eaten something non-kosher? Maybe you can eat small non-kosher food by kissing her. If her whole mouth is not kosher due to the hot ...
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677 views

Why doesn't Kellogg's print the symbol of their certifying agency on their boxes

I have separated my previous question about Kellogg's cereals into different posts based on the comments on that question. The cRc recommends Kellogg's cereals with only a k on the box. In my ...
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129 views

Can a secular Jew drink non mevushal wine that he touched?

If a secular (non-observant) Jew touches wine that isn't mevushal does that render it not kosher for him to drink? Nafka Mina: gifting non-mevushal wine to a secular friend.
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103 views

Eating in a non-kosher household [duplicate]

I am a converted Jew (mother is not Jewish, father is) who has recently began keeping Kosher. My mother is an excellent cook, and I greatly enjoyed eating what she made growing up. I still would like ...
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hot pot and trief

I heard that placing hot pots onto counters or refrigerator shelves could treif the pot (although not its contents) if the counter or shelf is dirty with an opposite type of foodstuff. Is there a ...
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Does a mashgi'ach revoke a store's hashgacha when health department finds insects?

The city health department has cited a kosher restaurant as having violations because they found mice and insects crawling on the food in the kitchen. Since mice and insects are non-kosher, I'm ...
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546 views

Kashrut of rennet for cheese & Difference between rennet and gelatin

I actually have 2 questions which are related. Traditionally, making cheese involves using rennet, a substance derived from animal stomach. If the rennet is derived from a non-Kosher animal, it is ...
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Do non-toxic, biodegradable kitchen/dish cleaners pose a Kashruth problem?

In certain instances, I've heard rabbis allow soaps and harsh cleaners to be used to make food and food-residue "Pagum" (ruined), which then removes any prohibition that might otherwise result when ...
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279 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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Kashering cold dishes for Pesach

If a vessel only held cold food, never hot, but was washed in the dishwasher, does it need hagalah for pesach? Or nothing? Is your minhag not to use any year-round cookware for pesach, or do you ...
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130 views

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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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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136 views

Microwave oven and goy (me) cooking [duplicate]

Is cooking kosher food by a Goy - in this case me (doing giyur) in a microwave oven making the oven unsuitable for use by a Jew? I asked one rabbi who said there is no halakhic issue. I live in a ...
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Is honey extracted from a dead bee kosher?

Bees themselves are not kosher, but their honey is. The honey is taken from the hive. If I found a bunch of dead bees and I cut them open and extracted the honey from the body, can I eat this?
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Purple/Red Cabbage kashrut issues

Funny thing happened to me tonight. I was buying some falafel and noticed that they did not have any "purple cabbage" (a.k.a. red cabbage) as a side dish option. I asked if they had any in back, and ...
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Were flour tortillas invented by the Jews of New Spain?

I was reading the Wikipedia entry for tortilla. It says, The wheat flour tortilla was an innovation by exiled Spanish Jews who did not consider corn meal to be kosher, using wheat brought from ...
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Can olives infected with worms from the olive fly be used for making olive oil

Here, in Portugal they produce olive oil from olives that contain worms (from the olive fly). In our harvest we see an infection that is above the 80%. We spoke with locals in the area and they told ...
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Where in the sources do we find a list of kosher birds?

In the parsha this past week (re'eh) we find a list of birds that are not kosher. This is unlike the Torah's approach to mammals and fish, where we are told to identify those that are permitted by ...
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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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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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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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Are you allowed to take pills with gelatin [duplicate]

According to Halacha, are you allowed to take pills that are covered with gelatin? It's an antibiotic for acne.
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What is the best way to keep updated with status of hechsheirim in Israel?

There are many halachic (and sociopolitical, agricultural, religious, economical, etc.) kashrut issues pertinent to Israel alone, leading to a great variety of challenges that kashrut authorities ...