A volume of platelet-rich blood product is obtained from a volume of anti-coagulated blood to prepare a composition for promoting the growth of hair follicles within skin. A portion of the skin is traumatized to form a treatment area in which stem cells within the hair follicles are activated. A protein matrix is formed from the platelet-rich blood product composition to entrap growth factors. The platelet-rich blood product composition is infused into the treatment area to form a complex between the protein matrix and the growth factors so that the stem cells attach to the complex and proliferate within the hair follicles.