GHK Cu Peptide Copper Peptide Research Beyond Peptides Copper peptides (GHK Cu) have been studied for decades for their role in tissue repair and that same biology applies to hair. Research shows GHK Cu may help strengthen existing hair follicles, reduce Let's talk about GHKU CU GHK Cu: The Regenerative Glow Peptide GHK Cu (Copper Peptide) is a naturally occurring peptide in your body that plays a powerful role in cellular repair, skin GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration Pickart 2015 BioMed Research International Wiley Online Library