What is growth hormone: Growth hormone is a protein hormone secreted by the anterior pituitary gland. Growth hormone is indispensable for the normal growth of the human body. In addition to its role in increasing height, it also plays an important role in the function of the heart, kidneys and the growth and development of the skin, internal organs, bones, muscles and gonads; it has a greater impact on the metabolism of sugar, fat and protein in the human body. Growth hormone deficiency can cause a series of abnormalities such as short stature, osteoporosis, poor muscle development, susceptibility to cardiovascular diseases, poor sexual development and easy aging. Zhou Lina, Department of Pediatric Respiratory Medicine, Wuxi People’s Hospital How to determine growth hormone deficiency: Normal human growth hormone normally contains very little in the blood, and only during deep sleep at night will several secretion peaks occur. The peak value of growth hormone secretion can only be measured by drug stimulation test and multiple blood collection (usually intravenous needle is used to reduce the pain of multiple venipuncture). The peak value is used to determine whether the growth hormone is deficient or not.