Insulin-like growth factor 1 is a polypeptide with growth-promoting effects in the human body, which can be secreted by various tissues and organs such as the liver, kidneys, lungs, heart, brain, and intestines, and can promote growth and development, regulate glucose metabolism, and so on. Insulin-like growth factor 1 is a polypeptide with growth-promoting effects, which can mediate the function of growth hormone and is an important growth factor in childhood. Insulin-like growth factor 1 can be secreted by various tissues and organs such as liver, kidney, lung, heart, brain and intestines, but the circulating insulin-like growth factor 1 is mainly secreted by the liver, and its synthesis is mainly regulated by growth hormone, which is also related to age, gender, nutritional status and other factors. Ask your doctor for more information.