Amino acids are the building blocks of muscle. Whey Isolate Ready-to-Drink contains all of the essential amino acids, including the branched chain amino acids, isoleucine, leucine, and valine, to help enhance muscle protein synthesis. Metabolic and physical demands require amino acids and these must be replaced in order to repair and rebuild muscle tissue. What does all that mean? Whey Isolate Ready-to-Drink gives you high quality protein to help fuel muscle growth.