Calcium Caseinate is a slow digesting protein supplement derived from fresh skim milk. It contains higher level of glutamic acid than whey and soy and because it is slow to digest, it helps other proteins become digestible, allowing the body to absorb more amino acids and peptides. Calcium Caseinate is rich in calcium, proteins and amino acids. Calcium Caseinate is a supplement usually taken by body builders and other athletes before bedtime, with breakfast or after workout. Studies show that when Calcium Caseinate was administered to some bodybuilders, the strength gains were twice as much as when they were given whey proteins. This is because the slow digestion of Calcium Caseinate causes a sustained release of amino acids that prevents the breakdown of muscle tissues.