GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? 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, Glow Peptide Injection: Revolutionizing Skin Rejuvenation Hubmed GHK Cu Rigenerazione e antiossidante PepticoreAminos GHK CU aka the beauty peptide. I've got the reconstitute and dose chart at the end for reference. Where I purchase mine from Elite Peptides Australia Discount code WISHY10 (because who doesn't love GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy