Amino acids are nutrients that make up all the body's proteins. In bodybuilding, amino acids are of particular importance, because muscles are almost entirely composed of protein, that is, amino acids. The body uses them for its own growth, recovery, strengthening and production of various hormones, antibodies and enzymes. Not only the growth of muscle strength and "mass" depends on them, but also the recovery of physical and mental tone after training, catabolism, lipolysis of subcutaneous fat, and even the intellectual activity of the brain - a source of motivational stimuli.