GHK Cu Peptide The benefits, side effects, and more [2026] GHK Copper Peptide GHK Cu Tripeptide 1 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: What It Does for Body Composition and Metabolic Health A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend