Human Growth Hormone-HGH(GH) helps to maintain, build, and repair healthy tissue in the brain and other organs. This hormone can help to speed up healing after an injury and repair muscle tissue after exercise. This helps to build muscle mass, boost metabolism, and burn fat. HGH is also said to benefit the quality and appearance of the skin. It’s said to slow down the aging process and treat age-related diseases. However, research supporting these claims is limited. HGH works by stimulating metabolic processes in cells to activate metabolism. It stimulates the liver to make an insulin-like protein that produces cartilage cells. This plays a part in bone and organ growth, as well as muscle protein synthesis.