Now Foods, Branch Chain Amino, 12 OZProduct Description Leucine, Isoleucine and Valine come under the category of the Branched Chain Amino Acids (BCAAs). These are important amino acids, and cannot be made in the body. BCAAs help in muscle protein synthesis. BCAAs can be used to help during exercise by athletes and regular people, BCAA supplementation can help to preserve existing muscle tissue. BCAAs can support the recovery process by promoting the standard repair processes that take