IDS BCAA - Rapid Release - 120 tabs are a potent source of Branched Chain Amino Acids (BCAAs). Nutritional supplementation with BCAAs within an hour of intense exercise dramatically decreases the amount of post-workout muscle breakdown. BCAAs stimulate muscle protein synthesis and increase the nitrogen balance within muscular tissue, which leads to muscular tissue growth. BCAAs also spare muscle glycogen stores so muscles stay full instead of falling flat. Research has shown that 50% of amino acids taken up by muscles after intense exercise are BCAAs.