Growth factor is a peptide hormone. Growth factor is a general term for a variety of peptides that can promote cell growth and also regulate cell function by binding to cell membrane receptors with specificity and efficiency. For example, insulin-like growth factor (IGF-1) can promote the growth of bones, muscles, and internal organs; epidermal growth factor can be used for skin healing after trauma; and interleukin growth factor is effective in cancer control. Other types such as nerve growth factor, fibroblast growth factor, and EPO also have a great effect on our body. Growth factors are peptide hormones secreted by normal cells. When the lack of various types of growth factors in the body is found, it should be diagnosed and treated in time to avoid affecting the health of the body.