Google the words “human stem cells skin care” and you will see more than 3 million search results. But when it comes to topical skincare products, the discussion of stem cells is really about growth factors, cytokines and chemokines. Some are grown in the laboratory and others are found in stem-cell-conditioned media.
Cytokines and chemokines are signaling proteins, released by cells, that serve as messengers and affect the behavior of other cells. Cytokines, in particular, often regulate inflammatory responses. Growth factors stimulate cellular proliferation.