I've been getting a lot of questions about GHK Cu, so here's a quick breakdown. GHK Cu is a copper peptide that naturally occurs in the body and plays a role in skin repair Amazon.com: LUMORA GHK Cu Copper Peptide Face Serum Advanced Skin Firming & Rejuvenating Serum for Collagen Boost, Smoother Skin & Complexion Renewal 1 fl oz : Beauty & Personal Care GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu Face Serum 1200MG Lab Tested & High Potency Neurogan Health