HGH 5 ui(Human Growth Hormone) is a natural protein containing 191 amino acids. These amino acids are synthesized by somatotrophs which are specialized cells of the pituitary gland. It controls many functions, particularly, metabolism in the human body. One can assess the importance of HGH through its multiple functions in the body. It promotes the cell division, repair the tissues and control the levels of other body hormones and enzymes in the blood. It causes normal growth of the body during childhood and youth, while in adults, it plays its role in the nourishment of the muscles, in maintaining body weight and boosting the energy.