The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, GHK Cu by InfiniWell Charny Healing Blue Copper Peptide Ghk Cu 99% Care Ghk Cu 50mg 100mg vials Cosmetic Ingredient GHK GHK CU and blue copper GHK Cu: The Skin Rejuvenation Peptide PeRx GHK Cu Copper Peptide Powder, CAS 49557 75 7, Purity Vietnam Ubuy