Creatine molecule is the basic energy vehicle in muscle cells. Appropriate supplementation of the creatine level in the body increases the phosphocreatine content, enabling rapid re-synthesis of ATP ? the direct energy source, which contributes to the increase in intensity and efficiency of muscle work. High creatine concentration in muscles stimulates protein synthesis with anti-catabolic and anabolic effects, which contributes to the more rapid growth of so-called lean muscle mass and muscular performance.