Page 1 Reviews Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets, 0.52 oz (15 g) iHerb Copper Peptides Serum for Face 2% GHK CU & 4% EGF Seraphime HealthyDerm GHK CU Peptide Beef Tallow for Skin: Blue Balm with Methylene Blue, Manuka Honey & Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference GHK Cu Peptide for Skin & Hair Facial Serum & Scalp Solution