When Muscle harm"s world-renowned scientists teamed up with legendary fitness icon Arnold Schwarzenegger, they looked at how to bring a superior whey protein to market. And they knew the answer was "more." Specifically, they needed a higher protein formula to enhance nitrogen retention because muscles can only grow if a body retains more nitrogen. One of the most effective nitrogen sources is whey protein. To fuel more lean muscle development, our ultra-micro filtered whey delivers naturally-occurring anabolic amino acids directly to your bloodstream. This spike in amines creates the nitrogen-rich environment needed for muscle protein synthesis. This is the key to building lean muscle.