NOW Whey Protein is a delicious blend of three of the highest quality whey protein concentrates and isolates from around the world: microfiltered; ion-exchanged; hydrolyzed (partially pre-digested). This blend of specially processed whey proteins is designed to maximize amino acid absorption and Biological Values (BV). Extra L-Glutamine has been added (550 mg per serving) because of its important role in protecting muscle tissue from breaking down under stressful, vigorous physical activity.