Casein is a protein naturally present in cow's milk. It is widely used in the cheese and dairy industries to give structure and substance to cheeses and yoghurts.
Casein helps build muscle mass thanks to its long-lasting action. It releases amino acids into the bloodstream for up to 7 hours. In fact, during long periods without protein intake, such as at night, the body draws amino acids from the muscles, thereby destroying muscle fibers. An intake of casein before bedtime therefore helps reduce muscle catabolism by releasing the amino acids your body needs as it digests them.