Creatine

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…phosphorus in the muscle and it is converted into creatine phosphate of CP. When the CP and useless ADP combine it turns back into the ATP and gives you more energy to fuel your muscles. Creatine also produces muscle mass. The mass is produced when there is fluid pulled into the muscle tissue causing them to swell. The early studies of creatine state that water is pulled into muscle cells, which makes more muscle mass.