Support for muscle protein synthesis. Practitioner exclusive, Muscle up! complement your workout lineup with metagenics BCAAs, featuring clean, high-quality branched-chain amino acids. Metagenics BCAAs is formulated with a 2:1:1 ratio of leucine to isoleucine to valine. Branched-chain amino acids can be an important part of workout recovery—helping to support muscle protein synthesis and reduce temporary muscle soreness after exercise.