The BCAAs, l-leucine, l-isoleucine, and l-valine, are probably the most essential amino acids for athletes in training. They account for 33% of muscle protein. Some experts believe that even moderate exercise can increase your body's need for leucine by up to 240%. By taking Reflex Nutrition BCAAs before and after exercise you can increase nitrogen retention, boost protein synthesis, and protect your muscles from the stress and trauma of heavy exercise. Reflex B.C.A.A's are available in the following amounts: 200 and 500 capsule containers. Dosage Directions for use: Take 6 capsules 30-40 mins before training, and another 6 capsules immediately after training.