Sport Definition BCAA DEFINITION is a product based on 100% high quality amino acids branched. This is one of the best products of this type on the market! It is distinguished by a high concentration of amino acids, great taste, no unnecessary fillers and additives. It uses the best BCAA ratio of 2: 1: 1 (leucine: isoleucine: valine). There are many theories on this subject, and the proportion of each has its supporters, but just the quantitative ratio is the most natural and is close to their natural amount occurring in the muscle tissue. Therefore carries the greatest benefits for the athlete's body!