A lot of people asked how I use GHK Cu (copper peptide) with a pen device, so here's a quick tutorial showing exactly how I do it. In this video I show how GHK Cu Peptide: Benefits & Usage Neurogan GHK Cu (Copper Peptide) Neck & Face Serum Global Ubuy 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 Glow Up Patches, for glowing skin & hair growth Hapi Patch HapiPatch