GHK Cu Peptide: What It Does for Body Composition and Metabolic Health GHK Cu (copper peptide) is a science backed anti aging compound that supports collagen production, skin regeneration, and overall skin health. Used in both topical serums and subcutaneous Copper peptide GHK Cu Wikipedia KPV NAD+ GHK Cu Peptide Patch Medical Imaging and Therapeutics Glutathione GHK Gu Peptide Patch Medical Imaging and Therapeutics