GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes 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 Can GHK Cu Be Taken Orally? Oral GHK Cu Bioavailability, Tablets & Copper Peptide Safety Neurogan Health Buy GHK Cu Peptide 99%+ Purity GHK Cu for Research