Copper peptides explained what are the differences between copper peptides and GHK CU peptides? What they actually do for the skin in terms of repair and collagen, and what you can and cant mix GHK Cu is a powerful copper peptide that helps restore what aging naturally slows down: repair, collagen production, and overall skin resilience. The result? Smoother texture. Firmer feel. Healthier looking skin and hair. Schedule GHK Cu Peptide Regenerative & Cosmetic Research The tripeptide GHKCu complex ameliorates lipopolysaccharideinduced acute lung injury in mice Oncotarget