GHK Cu Peptide: What It Does for Body Composition and Metabolic Health GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not Glow from within with GHK Cu Copper Peptide , This powerhouse peptide supports collagen production, skin repair, and hair follicle health, helping improve skin firmness, radiance, and support Should Bodybuilders Take GHK Cu? Neurogan Health