MicroPure Whey Protein Isolate is the gold standard for excellence in terms of protein quality and efficacy. MicroPure Whey Protein Isolate also includes 12 grams of highly anabolic essential amino acids and 6 grams of BCAAs (leucine, isoleucine, and valine) to accelerate recovery and growth. One of the most important BCAAs, Leucine, works as an anabolic trigger, metabolized directly in muscle tissue to encourage a muscle-building stimulus. Whey protein isolate has the highest levels of leucine of any known protein source.