Dietary supplement. Lean mass. Power. Strength. Creatine is an amino acid found primarily in muscle tissue. It is phosphorylated to store energy used for muscular contraction. AST Sports Science Micronized Creatine Monohydrate has been shown in scientific studies to support increases in muscle fiber size, lean muscle mass and strength. This scientifically proven form of creatine delivers you an advanced micro-particle technology designed to go into solution rapidly and remain suspended in solution longer. This advanced formula delivers a stable, fast acting, rapidly absorbing, ultra-effective creatine without the stomach upset or gritty creatine residue. AST Sports Science Micronized Creatine is the only creatine supplement scientifically proven to directly impact muscle fiber size. It's time to put the power of science and the power of AST to work for you. Creatine Monohydrate has be shown in studies to be over 900% more efficient than other forms of creatine such as creatine-ethyl-ester. Contents packaged by weight-not volume. Some settling may occur. (These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease). Made in USA.