If there is one supplement you can trust and bank on, it's creatine. Creatine is the most widely studied and researched amino acid and has been proven to improve athletic performance and strength output. When supplemented, creatine turns into creatine phosphate in the body which is then in turn transformed to adenosine triphosphate (ATP). ATP provides the energy for muscle contractions. By increasing your ATP stores, this acts like a back up energy generator, helping you to push your sets harder and get more reps in!