Creatine is one of the most essential sports nutrition supplements in an athletes life. Its results include: Rapid increase in strength Improving exercise endurance Muscle swelling Quick recovery It is a completely safe and natural product, which is also synthesized in our body from three amino acids (glycine, arginine and methionine) and is recommended for strength and endurance athletes. Optimum Creatine is the purest creatine monohydrate in the world.