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 Copper Peptide (GHK Cu) 2% Recovery Serum GHK Cu might be trending, but its not new., Before you inject yourself with this viral peptide, consider this., This copper peptide has been studied for years in skin repair and collagen signalling, GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B