GFC is prepared from the patient's blood in a closed system where platelets are activated ex vivo to release growth factors like PDGF, VEGF, EGF and IGF1, which are then injected into Copper peptides (GHK Cu) have been studied for decades for their role in tissue repair and that same biology applies to hair. Research shows GHK Cu may help strengthen existing hair follicles, reduce Peptides for Hair Growth: promising, but not magic., Hair growth is not controlled by one single factor. It depends on the hair cycle, follicle health, blood supply, inflammation, hormones, GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective?