GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Parents & teen athletes: not everything trending on social media is safe. Copper peptides like GHK Cu are being promoted for skin health, but these products are unregulated and not FDA approved, which GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum