GHK Cu Peptide The benefits, side effects, and more [2026] 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 Copper Peptides Before and After: Visible Skin Improvements Explained Hubmed Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit GHK Cu: The Elegant Copper Peptide for Skin and Scalp Renewal Renew Vitality