What Can’T Jewish People Eat?

Jewish dietary law, known as kashrut, sets clear rules about which foods are allowed and which are forbidden. The rules come from the Torah and have been interpreted by rabbinic authorities for thousands of years. For observant Jewish people, these are not suggestions — they are religious obligations that shape daily eating habits. The two biggest categories of forbidden foods are pork and shellfish, but the full picture is more detailed. Kosher law also covers how animals are slaughtered, how meat and dairy are combined, and even which parts of an animal can be eaten.

What Foods Are Forbidden Under Kosher Law?

The Torah lists specific animals that are not permitted. The rules are straightforward for land animals, birds, and fish.

Land animals must have two features to be kosher: they must chew their cud and have split hooves. Cows, sheep, and goats qualify. Pigs have split hooves but do not chew cud, which makes pork forbidden. Camels chew cud but lack split hooves, so they are also not kosher. Rabbits and horses are out for similar reasons.

Fish must have both fins and scales to be kosher. This means salmon, tuna, and carp are fine. But shellfish — shrimp, crab, lobster, clams, and oysters — are not kosher because they lack scales. Catfish and sturgeon are also excluded because they do not have true scales.

Birds are treated differently. The Torah lists forbidden birds rather than permitted ones. In practice, the kosher bird list includes chicken, turkey, duck, and goose. Birds of prey and scavengers such as eagles, hawks, and vultures are forbidden.

Why Is Pork Specifically Forbidden?

Pork is the most widely recognized forbidden food in Jewish dietary law. The Torah states plainly that the pig is impure because it does not chew its cud, even though it has split hooves.

Many people assume pork is banned for health reasons, such as trichinosis risk. That is not the basis of the law. Kashrut is rooted in religious commandment, not food safety. The Torah does not explain the reasoning behind each dietary rule, and Jewish tradition generally treats these laws as divine decrees that are followed because they are commanded.

That said, the symbolic weight of pork in Jewish identity is significant. Historically, forced consumption of pork was used as a test of Jewish loyalty during persecutions. This history reinforces why pork remains a defining boundary food for many Jewish communities.

How Are Meat and Dairy Separated?

Beyond which animals are permitted, kosher law sets strict rules about combining foods. The Torah says three times: “You shall not boil a kid in its mother’s milk.” Rabbinic tradition interprets this broadly to mean that meat and dairy cannot be eaten together at all.

This rule affects more than cooking. Observant Jewish people maintain separate sets of dishes, pots, utensils, and even separate dishwashers or sinks for meat and dairy meals. After eating meat, a person must wait a set period — commonly three to six hours, depending on community custom — before eating dairy. The reverse waiting time is shorter, often about an hour after dairy before meat.

This separation also changes restaurant choices. A kosher restaurant is either meat, dairy, or pareve (neutral). A meat restaurant cannot serve cheeseburgers. A dairy restaurant cannot serve chicken parmesan.

What Other Restrictions Apply to Kosher Meat?

Kosher meat must come from an animal that is both a permitted species and slaughtered according to specific rules. The slaughter method is called shechita. A trained slaughterer uses a perfectly sharp blade to cut the throat in one continuous motion, aiming for a quick and painless death. If the cut is flawed in any way, the animal is not kosher.

After slaughter, the animal is inspected for internal abnormalities. Certain adhesions or lesions in the lungs can make the animal non-kosher. This inspection is called bedika. The percentage of animals that pass varies, but it is not uncommon for a portion to be rejected.

Certain cuts of meat are also forbidden by kosher law. The sciatic nerve and certain blood vessels must be removed. This is a difficult process, so many kosher butchers simply sell the hindquarters — the area containing the sciatic nerve — to non-kosher markets. This is why kosher consumers typically eat front-quarter cuts like brisket, chuck, and short ribs, while sirloin and flank are harder to find kosher.

Blood is also forbidden. The Torah prohibits eating blood because it represents life. Meat must be soaked, salted, and rinsed to draw out blood. Alternatively, meat can be broiled over an open flame to achieve the same effect. This is why kosher meat is often saltier than conventional meat.

Are There Rules About Grains and Produce?

Yes, but they are less restrictive than the meat and dairy rules. Most fruits and vegetables are kosher. The main concerns are insects and certain agricultural laws.

Insects are not kosher, so produce must be checked carefully. Leafy greens like lettuce and spinach are notorious for harboring tiny insects. Many kosher consumers wash and inspect each leaf. Some authorities have ruled that certain vegetables, like broccoli and raspberries, are so difficult to check thoroughly that they should be avoided unless bought with kosher certification.

During Passover, additional rules apply. For eight days, leavened wheat products are forbidden. Observant Jewish people eat only unleavened bread called matzah and avoid any food made from wheat, barley, rye, oats, or spelt that has come into contact with water and been allowed to ferment. This is a separate and stricter set of rules that applies only during the holiday.

What Does Kosher Certification Mean?

Processed foods are complex. A single product can contain dozens of ingredients, some derived from animals. To know whether a food is kosher, consumers rely on certification.

A hechsher is a symbol on a food package indicating that a rabbinic agency supervised the production. Common symbols include an OU (Orthodox Union), a K within a circle, or a Star-K. These agencies employ inspectors who verify ingredients and equipment meet kosher standards.

Some foods are inherently kosher and need no certification. Plain water, whole fruits, vegetables, and raw nuts are examples. But any processed food — even something as simple as a bag of chips — may contain non-kosher ingredients like emulsifiers derived from animal fats. Certification removes the guesswork.

Consumers should know that kosher certification does not mean a food is healthy. Kosher soda, kosher candy, and kosher fried foods are still sugar and fat. Kashrut is a religious system, not a nutrition plan.

Do All Jewish People Follow These Rules?

No. Observance varies widely across Jewish communities. Orthodox and Conservative Jews generally follow kashrut, though the strictness of interpretation differs. Reform Judaism treats kashrut as optional, and many Reform Jews do not keep kosher.

There is also a spectrum within those who do observe. Some people keep kosher at home but eat in non-kosher restaurants. Some eat only kosher meat but do not separate meat and dairy. Some avoid pork and shellfish but eat other non-kosher foods. The term “kosher-style” often describes Jewish foods like bagels and lox that use kosher ingredients but are not certified or prepared under supervision.

What matters is that each person or family defines their own practice, often guided by their rabbi and community standards. There is no single answer that applies to all Jewish people.