Oligopeptide Branched Chain Amino Acid Powder for Workout Recovery What is Best BCAA? BPI Sports' Best BCAA is not your typical run-of-the-mill, same as everyone else, outdated BCAA product. Not even close. This formula is the first to bond the three branched chain amino acids - leucine, isoleucine and valine - utilizing a proprietary process route, to form oligopeptides (a bonded chain of amino acids; for example, a peptide linked chain). The oligopeptide-based branched chain amino acids may act as a better transport vehicle, which may allow for more efficient metabolization, greater bio-activity, enhanced onset time, and a generally improved BCAA model. This formula also includes CLA to support fat management and body composition, along with agmatine.