GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect GHK Cu: The Peptide That Supports Healthy Aging GHK Cu (copper peptide) is naturally occurring in the body and plays a role in supporting skin health, collagen production, and tissue repair. As GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Neurogan Health Copper Peptide GHK CU , 120 mcg, 60 Tablets, 0.52 oz (15 g) eBay GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia