Nutrition and Supplements Amino acids BPI Sports Best BCAA 30 portions Blue Raspberry BPI Sports has been manufacturing the best tasting amino acid products for 10 years. Our award winning formula, Best BCAA, is powered by 5g of branched chain amino acids (BCAAs) and conjugated linoleic acid (CLA) to support muscle growth, fat loss, sports performance and recovery. The three BCAAs are leucine, isoleucine, and valine. These three amino acids play a particularly important role in muscle growth by stimulating protein synthesis and preventing protein catabolism. No matter what goal you are working towards, you can count on Best BCAA to help you achieve it. The hardest part will be choosing from all the delicious flavors. Branched chain amino acids (BCAAs) are the building blocks of proteins. As such, they play an integral role in the growth, maintenance and repair of muscles.