Albumen – Derived from milk or egg whites and used as a food binder in soups and baked goods.
Casein – A protein in cow's milk with ingredient names like ammonium caseinate, calcium caseinate, potassium caseinate, and sodium caseinate. Used to enhance the texture of foods, including cereals, breads, and chocolates.
Gelatin – Get this: Gelatin is made by boiling the skin, tendons, ligaments, and/or bones of cows and pigs. Yuck!
Lard – Pig fat occasionally used in cooking and baking.
Lecithin – Animal-based lecithin comes from animal fat and eggs (soy lecithin is made with soybeans) and is used as an emulsifier.
Whey – The remaining liquid after milk curds are separated out, whey is often found in protein powders and energy bars.