GHK Cu Peptide: What It Does for Body Composition and Metabolic Health Copper Peptide Serum (GHK Cu) Nardo's Natural Private Label GHK Cu may be trending, but it's nothing new to us. We have been using GHK Cu (our Copper Peptide Complex) for over 15+ years post treatment and in your dialy routine. #GHKCu #CopperPeptides # 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