NOW Whey Protein Isolate is a high quality protein supplement that is both bioavailable and easily digested. It is an ion-exchanged, fat-free and lactose-free athletic supplement that Enhances supports protein synthesis, which in turn supports the production of new muscle and other tissues. NOW Whey Protein Isolate contains a high concentration of Branched Chain Amino Acids (BCAA's), which are important for efficient muscle metabolism.