Human growth hormone (HGH) is a naturally occurring substance that is manufactured in the body by the pituitary gland. The body produces a large amount of HGH during childhood and adolescence. HGH is responsible for the growth spurts, muscle development, and other physical changes that occur during this period of the child’s life. HGH is critical for the normal development of children and adolescents.
Children who are unusually short or who have other health problems may be given supplemental HGH to regulate their growth and development so that they may have normal lives (Waxman). HGH also helps the bodies of children, adolescents, and young adults to heal faster and to recover more quickly from physical exertion. Natural production of HGH begins to taper off at about age 30 (Liu, Bravata, Olkin, et al). This reduction in HGH is part of what triggers the body’s natural ageing process.
Lower HGH levels mean less and eventually no growth of bone or muscle mass, slower healing for injuries, and longer recovery times from physical exertion. By age 60, there are only trace amounts of HGH left in the system. HGH production continues to decline as the individual grows older. Eventually, the body no longer produces enough HGH to repair the damage caused by disease or injury or even by effects of everyday wear and tear on organs.