branched chain amino acids valine leucine & isoleucine are chiefly responsible for promoting muscle protein synthesis ideal for those pursuing strength & muscle gains. these special amino acids may also be useful in delaying mental fatigue in endurance exercise. bcaa's make up 33% of muscle protein making them of special importance to people who train regularly. this product is formulated with what is termed ‘free form’ amino acids that have been independently produced & then combined in the 2:1:1 ratio. some cheaper bcaa (branched chain amino acids ) products just contain hydrolyzed soya protein as the source of the amino acids whereas our product provides the pure grade of amino acids used in -clinical nutrition products. our bcaa’s come in a handy capsule form.