Long chain human insulin-like growth factor (Long IGF-1 R3) is a kind of protein which has 83 amino acids. Long IGF-1 R3 has many functions, such increasing protein synthesis, increasing the RNA synthesis, promoting fat metabolism and glucose transport. Therefore in bodybuilders and athletes, the Long IGF-1 R3 can promote the muscle cell become large and transform the fat into energy. Perhaps the most interesting and potent effect IGF has on the human body
