Creatine is a nitrogenous compound stored in the muscle of mammals and fish, 95% of which is stored in skeletal muscle (making animal meat an excellent dietary source), but a small number (half a kilogram of meat can only provide 1 grams of creatine). Creatine monohydrate, as a form of creatine, is easily absorbed by the body and helps improve physical performance during sustained short, intense workouts.