Branched chain amino acids are so named of the - because of its unique chemical structure and belong to the category of essential amino acids, which means that the body can not produce them itself. Amino acids BCAA - leucine, isoleucine, valine can only be purchased through your diet or supplements. BCAA will help to create an anabolic environment within the body due to stimulation of muscle protein synthesis, slowing of muscle damage during exercise and also participate in the creation of glucose to help produce fuel for your muscles and prevent further decay of your muscles. On this if you want to give the elasticity of your body to retain or gain muscle mass you need to consume BCAA. I drink their daily workouts, rest days in no sense to drink them, because they need to workout and after. I drink them so as to exercise for 45 minutes and 6 capsules immediately after training 6 capsules. I advise, BCAA should be for everyone who is engaged in power sports. If my review proved to be useful to you, please click, "YES", and you can look at my page, just by clicking on my name and read my other reviews. Health to you and your family!