The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline The first order degradation profiles of GHK Cu in various medium stored Download Scientific Diagram GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or Dimeric copper peptide incorporated hydrogel for promoting diabetic wound healing Nature Communications GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack?