GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link GHK Cu is getting a lot of attention right now, and for good reason. This is not just a skin peptide. It's a copper binding tripeptide with documented effects on gene expression, collagen synthesis, Copper Peptide (GHK Cu) Supplier Cosmetic Ingredient for Formulators Creative Peptides GHK Cu: The Miracle Molecule for Skincare and Hair