GHK CU Crepey Skin Escape Platinum Skin Care 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 GHK Cu Peptide Serum EQLibrium GHK Cu Tripeptide 5 mg 60 Sublingual Tablets SuperSmart USA Copper Peptide GHK Cu Powder, DIY Blue Copper for Making the Best Face Cream