Creatine is a substance synthesized from three amino acids, arginine, glycine and methionine. It can be synthesized by the body itself or ingested in food. Creatine, a naturally occurring amino acid derivative in the body, rapidly increases muscle strength, accelerates fatigue recovery, and improves explosive power. The more creatine your body stores, the better your energy supply, the faster you recover from fatigue, and the stronger your exercise energy will be.