NOW&ampreg; Whey Protein Isolate is a high quality protein that is bioavailable, easily digested, and provides Branched Chain Amino Acids (BCAA's). These qualities make NOW&ampreg; Whey Protein Isolate ideal for active individuals. Whey protein is considered to have the highest Biological Value of any protein source - superior in essential amino acid content to beef, milk, casein or soy.