Human growth hormone is a peptide hormone secreted by the anterior pituitary gland, which mainly regulates cell growth, regeneration, repair, reproduction and metabolism, thereby contributing to the overall development of the body. Growth hormone consists of 191 amino acids and has a molecular weight of 22KDa. Its functions mainly include: 1) It exerts its physiological function by stimulating the liver and other tissues to produce insulin-like growth factor (IGF-1), and promotes the growth of bone and cartilage, thereby increasing the body; 2) Affect metabolism, thereby promoting protein synthesis, and enhancing the intake and utilization of important elements such as sodium, potassium, calcium, phosphorus, and sulfur; 3) By inhibiting the consumption of sugar and accelerating the decomposition of fat, the energy source is changed from sugar metabolism to fat metabolism. The indications approved in China are: 1. For children with slow growth caused by endogenous growth hormone deficiency; 2. For severe burns to treat adult growth hormone deficiency. Approved indications in the United States are: 1. Growth hormone deficiency (GHD) in children; 2. Chronic renal insufficiency before kidney transplantation; 3. HIV infection-related failure syndrome; 4. Turner syndrome; 5. rhGH in anti-aging , weight loss; 6, liver failure; dilated cardiomyopathy; 7, burns, severe trauma, postoperative, total intravenous nutrition, etc.; 8, improve immune function; anti-aging, infertility.