Creatine monohydrate increases muscle mass, strength, and power in many athletes. At first scientist’s thought that it worked by increasing high-energy fuels in the muscle, which helps athletes, train harder. More recent studies found that creatine supplements increase muscle satellite cells, which increase muscle size and improve the capacity for protein synthesis. A South African study using college rugby players showed that creatine monohydrate supplements increased testosterone (DHT), which is the most biological form of test. DHT increased 56% after a seven-day creatine-loading phase (20grams a day).