Muscle Milk offers quality you can trust. Our 100% Whey protein powder supplies your body with high quality protein to support post-workout recovery and muscle growth, or can be consumed as an energizing breakfast or snack that helps satisfy hunger. It provides a blend of high-quality whey protein isolate and concentrate to help increase amino acid levels. These essential amino acids play a role in muscle growth and maintenance of muscle mass. The formula is also NSF Certified for Sport.