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

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One Dishwasher for Milk and Meat Dishes [duplicate]

Can a dishwasher be used for both meat and milk dishes? Under what conditions? As far as I can tell it should be OK right afterwards since any taam would be lifgam because the dishes are covered in ...
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Is one allowed to have his child take a non-kosher oral vaccine if the law requires it to attend school?

Many state laws require that toddlers be vaccinated prior to attending elementary school. Years ago, the Sabin Polio oral vaccine was used. I'm uncertain if oral vaccines are used, now. Let's say ...
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Does Lubavitch Messianism pose a Kashruth problem? [duplicate]

This is a practical question for Kashruth, but there are multiple issues that play into it. Firstly do members of the Lubavitch community have heretical beliefs? Some prominent Lubavitchers have made ...
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Contemporary leniencies regarding the prohibition(s) of new grain

Since Talmudic times, Rabbinic scholars have grappled with the apparent contradiction between the Biblical and/or Rabbinic prohibition(s) of chodosh (new grain grown since Passover) and the common ...
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Are songbirds Kosher?

In Leviticus and Deuteronomy, there are sections that give a seemingly comprehensive list of non-Kosher birds. They are mainly birds of prey, not songbirds or birds like that. I know that there is no ...
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Why does medical marijuana need a kosher supervision?

Today, NY State joined several others in opening clinics to dispense medical marijuana. Distribution of this is restricted to patients who have severe illnesses such as Parkinson's Disease, epilepsy, ...
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Is weed kosher? [duplicate]

Some says that qnei boshem in the bible, one of the ingredient of holy anointing oil is a plural form of qneibos or cannabis. Ganja. Whether that's true or not, I sort of wonder. Is it kosher? It's ...
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Does anyone know about a recent brocolli bug problem?

I'm not sure if this is a recent localized problem or not. A few people in my neighborhood (New York City area) have told me that local Rabbinical councils have forbidden buying broccoli, as there is ...
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Can one buy a container of fresh ground nut butter from a health food store without kosher supervision?

Several "health food" stores near me have a machine that grinds fresh nut and butter. Two such stores are Fairway and Whole Foods. The nuts are grown in California and Georgia (the U.S. state, not ...
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May I use a clean can opener previously used for non-kosher cans?

It only had cold contact with treif, if any (only if the food reaches to top of the can); no duchka de sakina was involved. Its contact with my kosher food is also cold - if any (only if the food ...
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Why would spring water or mineral water need a kosher certification?

Nearly every popular U.S. brand of spring or mineral water that I've seen has a kosher certification symbol on the bottle. Amonng them are Perrier and Saratoga (mineral / sparkling) and Poland Spring ...
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Does food need to be double-wrapped for the fridge?

I am familiar with the idea ( What's the halachic advantage of double (or triple) wrapping food? ) that double-wrapping is necessary for a halachic separation in certain kashrus contexts. However, ...
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What are the kashrut issues with kosher food at a non-kosher restaurant?

What are the major kashrus/halachic issues with going to a non-kosher restaurant and ordering, say, [kosher fish] and vegetables; dressed with only extra-virgin olive oil, salt and pepper; ...
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Why should a kashrus certification agency change their standards?

Today I learned that the Oasis Mediterranean Foods company (located in Toledo, OH) has lost their hechsher on stuffed grape leaves. Formerly the entire product line was certified by Star-K, so I ...
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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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Are GMOs Kosher?

Currently taking a biology class in which genetically modified foods were discussed. Some of the plants had DNA from non kosher animals added into the plant genes. How does this impact the kashrus of ...
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Is AquAdvantage salmon kosher?

After two decades of deliberation, the USA's Food and Drug Administration has approved the first ever genetically engineered food animal, a fast-growing Atlantic Salmon called AquAdvantage ...
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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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How do I refuse nonreligious guest's salad?

I invited a non-religious guest over for a meal. I insisted that they don't need to bring any food with them. But they said they're going to bring a salad. I told them it isn't necessary but they ...
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Is the Citrus flavored Ciroc vodka kosher?

I would like to buy citrus flavored "Ciroc" vodka and wonder if it's kosher?
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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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If the Torah forbids meat and dairy together, why is it kosher to eat chicken with eggs? [duplicate]

Please correct me if any of this is incorrect. I understand that the reason for not being able to mix milk and meat in terms of kashrut is because you are mixing the milk of the mother with the ...
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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 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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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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What's this about a magical spitting bird?

In Christopher Hitchens's memoir Hitch 22, this passage caught my eye: In her preface to his collection of essays The Non-Jewish Jew Tamara Deutscher, widow of the great Isaac, relates the story ...
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Are the uncertified packaged pre cut vegetable and fruit platters in a non-Jewish store kosher

In the produce cooler section of stores (such as Costco), one can often find packages of shrink-wrapped cut up veggie and fruit platters. Would the fact that these are precut in the store require ...
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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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Kashrut of Kellog's cereal

The cRc recommends Kellogg's cereals with only a k on the box. In my experience, I have not heard of anybody who disagrees with this. This is an unusual situation, though, since normally a plain k ...
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Would a non-kosher Earth animal born in space be kosher?

Inspired by this question. The question linked quotes Sanhedrin 59b in saying that if an animal came down from heaven (whether it had kosher signs or not) it would be kosher. If I were, however, to ...
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Buying pre-cut ginger

May one use ginger root that is sold pre-cut? For context, I am curious about how the rules of davar charif might apply here. It seems to me that ginger would be a davar charif, so if it is cut with ...
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What are the characteristics of a kosher flour sifter?

there are flour sieves that are sold with rabbinical approval. You can see one here: http://cdn.instructables.com/FQ7/UKPN/FI8VJOBL/FQ7UKPNFI8VJOBL.LARGE.jpg What are the requirements for a kosher ...
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Using crockpot for a soap making project? [closed]

Preamble to my question: I was told by someone at Star-K that since soap is not food, it really doesn't even need a hechsher. For example, he told me that even though Brillo pads are not kosher, it ...
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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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After a kosher shekita, a non-kosher animal (cat) has eaten from the carcass. Is the carcass still kosher?

After a kosher shekita, a non-kosher animal (cat) has eaten from the carcass. Is the carcass still kosher? (The question describes not a real problem, I am just curious. In the reality, I've never ...
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Does Rooibos tea need a hechsher?

Unlike regular tea, which is from the plant Camellia sinensis, rooibos tea is derived from the plant Aspalathus linearis. I've checked CRC and Star-K and their tea-specific articles don't mention ...
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Does non mevushal wine make the vessels containing it treif?

As per halacha and many other questions here, non-Jews touching (etc.) non mevushal wine can cause the wine to become non kosher. Does this have any effect of the vessels holding the wine, ...
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If all ingredients are kosher, is the entire dish kosher?

I am working on an app that allows users to enter in recipes. I have access to some data about certain ingredients that the user can select for the recipe, such as if the ingredient is kosher. If all ...
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Does a rubber sink stopper transfer kosher status?

We rent a place with stainless steel sinks I kashered last Pesach to be fleishig but there are rubber sink stoppers all I could do was clean until they were clear of food particles. The people who ...
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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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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 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 ...