A person keeps kosher if he or she follows the acceped Jewish Dietary Laws. Jewish Dietary Laws are based on Biblical laws and rabbinical extensions. The following is a brief summary of these laws:
- It is only those animals that are ruminant, that is they chew their cud and have split hooves can be eaten.
- For those animals that can be eaten, the birds and mammals must be slaughtered in accordance with Jewish law.
- There are certain parts of permitted animals that may not be eaten.
- All the blood must be drained from the meat or broiled out of it before it can be eaten.
- Meat that is the flesh of birds and mammals cannot be eaten with dairy and its prodcts
- Eggs, fruits, vegetables and grains are considered pareve#, and can be eaten with either meat or dairy. Fish is also considered pareve, but some kosher observant Jews do not eat fish with meat.
- Utensils that have come into contact with meat (while hot) may not be used with dairy, and vice versa. Utensils that have come into contact with non-kosher food (while hot) may not be used with other kosher food.
- All grape products made by non-Jews must not be eaten.
# Jewish dietary laws considers pareve food to be neutral;
A more detailed explanation can be found at Judaism 101