Peptide hormones are made up of amino acids linked by peptide bonds. The smallest peptide hormones can be composed of three amino acids, such as thyroid stimulating hormone releasing hormone (TRH). Most peptide hormones can be composed of dozens, dozens or even hundreds and hundreds of amino acids. The main secretory organs of peptide hormones are the hypothalamus and pituitary gland. Peptide hormones such as gastrointestinal tract, brain tissue, lung and heart are also found in other organs, most of which are in the research stage.
The role of peptide hormones is to promote the growth and development of the human body by stimulating the growth of the adrenal cortex and erythropoiesis. A large amount of intake will reduce the level of endocrine and damage the body's health, and may also cause cardiovascular diseases and diabetes. Similarly, the abuse of peptide hormones can also form a strong psychological dependence.