GHK Cu Peptide: What It Does for Body Composition and Metabolic Health GHK Cu Peptide for Skin & Hair Facial Serum & Scalp Solution Copper Peptide (GHK Cu) 2% Recovery Serum GHK Cu Copper Peptide Regeneration, Skin Renewal & Anti Age 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 for Sale Tripeptide 1 3rd Party Tested US Made