GHK Cu Face Serum 1200MG Lab Tested & High Potency Neurogan Health GHK Copper Peptide GHK Cu Tripeptide 1 Most people treat GHK Cu like it's only for hair and skin. The real leverage is in the copper signaling + repair pathways that everyone overlooks. You don't need every peptide under the GHK Cu Revival Clinic Copper peptide questions we get asked all the time How often should you use it? Do you need to avoid the sun? If you're new, start once daily (evenings are great),