Answer:
Creatine
It is the compound, formed in protein metabolism and present in much living tissue. It is involved in the supply of energy for muscular contraction.
Creatine improves the strength and increase the lean muscle mass to help the muscles recover more quickly during exercise.
Creatine helps muscle cells to produce more energy. In high intensity exercise, its primary role is to increase the phosphocreatine stores in the muscles.
Creatine is also nitrogenous organic acid that helps in supply of energy in the body. It occurs naturally in meat and fish. It is made by the body. It also obtained by the supplements.