Nutrition and Supplements Amino acids Now Foods Branched-chain Amino Acids in Capsules 240 The Branched Chain Amino Acids (BCAAs), Leucine, Isoleucine, and Valine are essential amino acids and therefore cannot be produced in the body. BCAAs are critical for muscle protein synthesis, and because BCAAs can be used as fuel during intense exercise, supplementing with BCAAs can help preserve existing muscle tissue. Additionally, BCAAs can support the recovery process by promoting the normal repair processes that take place after exertion. BCAAs also play an important role in maintaining proper immune system function and supporting healthy aging. Take 4 capsules twice a day before meals or exercise. Only for adults. Consult your doctor if you are pregnant / nursing, taking medication, or have a medical condition. Keep out of the reach of children. Available Formats, 60, 120 and 240 Capsules.