Whey Protein Isolate is a high-quality protein that is both bioavailable and easily digested. Whey protein has naturally occurring branched-chain amino acids (BCAAs). NOW Whey Protein Isolate is ideal for active individuals. Whey protein is considered to have the highest biological value (BV) of any protein source - superior in essential amino acid content to beef, milk, casein, or soy. Natural color variation may occur in this product.