Should Bodybuilders Take GHK Cu? Neurogan Health Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule Link Between High Levels of Copper & Psychiatric Symptoms Psychiatry Redefined Protective effects of GHK Cu in bleomycin induced pulmonary fibrosis via anti oxidative stress and anti inflammation pathways ScienceDirect GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective?