The protein used in this product is a predigested collagen and whey (lactalbumin) protein and is therefore utilized 100%. Contains all the essential amino acids derived by enzymatically hydrolyzing the animal protein collagen and whey protein (lactalbumin). The amino acids in this product are naturally present in the protein. Predigested collagen, enriched with predigested whey protein, is a superior source of high quality amino acids.