GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Not all copper peptide serums are created equal And this is where a lot of people get confused. You'll see copper peptides on the label and expect amazing results but the GHK Cu Peptide Before and After Results Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule Cellular Glow Copper Peptide GHK Cu Serum for Face