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 peptides explained what are the differences between copper peptides and GHK CU peptides? What they actually do for the skin in terms of repair and collagen, and what you can and cant mix GHK Copper Peptide GHK Cu Tripeptide 1 GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B