GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK CU for Sale Tripeptide 1 3rd Party Tested US Made Peptide Series #1: The Copper Peptide. From wound healing to total skin rejuvenation, GHK Cu is the ingredient that acts as a blueprint for younger looking skin. Swipe to find out why it's GHK CU Infiniwell 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 a growing body of peer