Pro Series 2:1:1 Ratio | 8 g BCAAs | 5 g L-Glutamine Natural & Artificial Flavored & 5 g Glutamine Support 20 Servings Dietary Supplement Supports Muscle Growth, Recovery and Repair Banned Substance Tested PRO - Pro Series Optimum Nutrition True Strength The True Strength of BCAAs The Branched Chain Amino Acids (BCAAs) are essential amino acids which your body cannot produce on its own. Used in a 2:1:1 ratio of Leucine to Isoleucine and Valine, the BCAAs can help spare muscle tissue when consumed before and/or during endurance training, and help kick-start muscle building when consumed after strength training. We included vitamin C because of its antioxidant qualities and 5 grams of glutamine because this conditionally essential amino acid may help support recovery after intense exercise. Pro BCAA contains 13 g of amino acids, of which 8 g are BCAAs