Once the person reaches middle age, the production starts declining. The growth hormones act on many tissues that are present in the body. It stimulates the growth of bone and cartilage in children and adolescents. The protein production is given a boost with the help of the growth hormones and also promotes fat utilization. It raises the blood sugar by interfering with the action of insulin. Intake of growth hormones directly may not be safe. But if it is accompanied with proper exercise and diet, it can work wonders for a person and make him or her look young forever.