Protective effects of GHK Cu in bleomycin induced pulmonary fibrosis via anti oxidative stress and anti inflammation pathways ScienceDirect 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 KPV NAD+ GHK Cu Peptide Patch Medical Imaging and Therapeutics Topical GHK Cu: Skin Benefits, Best Forms, and Where to Buy