Stem cells are not growth factors; stem cells are cells that have the ability to grow and reproduce themselves, while growth factors are small molecules that promote the growth of cells. A stem cell is a type of cell that has the ability to proliferate indefinitely or to self-renew, and is capable of producing at least one type of highly differentiated daughter cell. Therefore it will come in many types, such as adipose stem cells, neural stem cells, and so on. Growth factors stimulate cell growth and promote and regulate cell growth and other cellular functions in the human body, so usually when culturing cells for growth, a variety of growth factors are needed to carry out regulatory effects. Therefore, it can usually be said that stem cells contain a large number of growth factors, but stem cells are not growth factors.