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, How Copper Peptides Block DHT to Prevent Hair Thinning and Loss HapiPatch Stimulating Natural Testosterone Production While Undergoing Testosterone Replacement Therapy Can Be Beneficial GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia GHK Cu Copper Peptide in LA 3,356+ Reviews