GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) GHK Cu Copper Peptide Neck & Face Serum Glow Up Patches, for glowing skin & hair growth Hapi Patch HapiPatch 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),