Creatine occurs naturally in the body; it is present in every human cell and functions as an energy store. Depending on body weight and muscle mass, the body stores between 100 and 150gmsof creatine, of which about 2 to 4gms are used every day for normal activity. Half of the required creatine is produced by the body itself, the rest must be obtained daily from food. Creapure is the only Creatine monohydrate in the world to be consistently tested free from impurities and by-products. Reflex Creapure Creatine is the only choice for those who want a research proven safe source of Creatine. This is especially important since other sources of creatine potentially contain impurities and by-products including creatine (CRN),dicyandiamide (DCD), Dihydrotriazine (DHT) and Thiourea.