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, Copper Peptides Elmhurst IL Chicago Accelerated Aesthetics GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu and Erectile Dysfunction: What the Evidence Actually Shows