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, Vital+ Hair Copper GHK CU Serum Hair Therapy Serum Daytryp RX Copper Peptides Elmhurst IL Chicago Accelerated Aesthetics GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK CU 100mg Cellgenic What Is GHK Cu? Discovery & Research Honest Peptide