GHK Cu Peptide: What It Does for Body Composition and Metabolic Health This is a product I purchased on Amazon, so I want to give it a quick review. *~Dumie GHK CU Facial Serum~* This is a Copper Peptide serum that is working amazingly for GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration GHK Cu Topical Cream Copper Peptides GHK Cu Beef Tallow Blue Balm Moisturizer 2.12 oz eBay 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