GHK Cu Peptide: Mechanism, Anti Aging Research, and Regenerative Benefits Molecular crystal structure of the tripeptide GHK Cu. In solution, Download Scientific Diagram GHK Cu is a powerful copper peptide that supports collagen production, skin and hair health, and tissue repair. It may help reduce fine lines, improve elasticity, and promote faster healing. Want to learn GHK Cu Peptide Benefits (And a Few Risks) Explained