Several popular diet patterns prohibit the inclusion of some categories of animal products and may also limit the conditions of when other animal products may be permitted. This includes but not limited to secular diets; like, vegetarian, pescetarian, and paleolithic diets, as well as religious diets, such as kosher, halal, mahayana, macrobiotic, and sattvic diets. Other diets, such as vegan-vegetarian diets and all its subsets exclude any material of animal origin.[6] Scholarly, the term animal source foods (ASFs) has been used to refer to these animal products and by-products collectively.[7]