What kind of food has to be kosher?
Almost every prepared food comes under the laws of kosher, since in its preparation it might have had non kosher ingredients added, or have been prepared in utensils previously used for non kosher foods. The only foods that a Jew can eat without worry are fruits and vegetables, and even these have to be carefully checked for insect infestations. Eating insects is strictly forbidden. Bread, cheese, milk, almost every grocery item save for fruits and vegetables (fresh tinned or frozen) should be supervised and have a “kosher” label affixed.
