Epigenetic mechanisms activated by GHK Cu increase skin collagen density in clinical trial EurekAlert! AHK Cu vs GHK Cu Difference Between GHK Cu and AHK Cu Everyone's calling GHK Cu a miracle peptide But let's separate marketing from mechanism. GHK Cu isn't magic. It's a signal. A signal that: Supports tissue repair Modulates inflammation Enhances collagen + GHK Cu peptide for collagen support and skin repair