GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? 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 Radiance Restore (Epithalon + GHK Cu) Pure Hydration IV Spa in Jacksonville GHK Cu Copper Peptide 0.5% (topical foam) Shell Medical Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit GHK Cu Peptide Benefits for Skin and Hair LIVV Natural