BPI Sports' BEST BCAA™ is not your typical outdated, run-of-the-mill, same as everyone else, outdated BCAA product.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).