GHK Cu Copper Tripeptide 1 Research Reagent We've been talking a lot about GHK Cu, but there's always more to learn. Most people think of it as a hair and skin peptide and this is true. But there is 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 What Is GHK Cu? How It Works in Research and Quality Signals