Platelets contain seven most important growth factors related to repair (PDGF/EGF/FGF/TGF/VEGF/KGF/IGF). When platelets are activated, they will release a large number of growth factors, which are homing. After injection into the scalp, they will be located in the damaged hair follicles, and through conditioning and repair, they will activate the regeneration of dormant hair follicles. Therefore, the treatment effect is very obvious, and insisting on treatment can finally completely restore the original density of hair.