Creatine monohydrate is essential for powering those muscle contractions we all need. It works by aiding in the creation of adenosine triphosphate (ATP), a compound that produces energy from food. When creatine is in abundance, the body can respond quickly and efficiently to demand for high-powered muscle activity. For years, athletes and body builders have trusted creatine to support their performance, and it can help those of all ages maintain healthy muscle tone when used with resistance exercises.