100% Whey Protein is an excellent quality protein exclusively from whey. Dietary proteins are the source of nitrogen and indispensable amino acids, which the body requires for tissue growth and maintenance. Therefore 100% Whey Protein contributes to the growth and maintenance of muscle mass, and also to the maintenance of normal bones Whey protein from milk is a so-called complete protein, because it provides the body with all the necessary types of amino acids, including the 9 amino acids the body cannot synthesize and must be supplied by the diet (i.e. Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine)