Casein Protein are most commonly found in mammalian milk, making up 80% of the proteins in cow milk and 20% to 45% of proteins from human milk. Casein has a wide variety of uses, from being a major component of cheese, food additive anda binder for safety matches. The casein protein supplements are milk protein and calcium caseinate. One can buy supplements online from Bodymart. Customer also see the reviews on Best casein protein supplements are also given here for references.