Some religions specify dietary rules to follow. One of the most confusing sets of guidelines applies to kosher foods. Kosher foods are items approved by kashrut, the body of Jewish law that supplies the guidelines for food preparation. Not all Jews follow these guidelines, but if they do, they are said to “keep kosher.”
Jewish dietary laws maintain certain rules for preparing foods that are not common in modern food preparation. These laws originated from the Torah, the first five books of the Hebrew Scriptures. The following information is an overview of Jewish dietary laws.
Small, Sarah Ross; Bastin, Sandra; and Clouthier, Debbie, "Kosher Foods" (2014). Family and Consumer Sciences Publications. 106.