Creatine is an amino acid (amino acids are the building blocks of proteins) which is made in the body by the liver and kidneys, and is derived from the diet through meat and animal products. The American Food and Drug Administration categorizes creatine as a food supplement (like a vitamin).
In the body, creatine is changed into a molecule called “phosphocreatine” which serves as a storage reservoir for quick energy. Phosphocreatine is especially important in tissues such as the voluntary muscles and the nervous system that periodically require large amounts of energy.
Studies have shown that creatine can increase the performance of athletes in activities that require quick bursts of energy, such as sprinting, and can help athletes to recover faster after expending bursts of energy.