GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration Peptide Calculator Cellgenic 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 Eden Health Club SYNTHAGEN LABORATORIES NL GHK CU TETRAPEPTIDE + CU For Skin Regeneration For Wrinkles and Scars Treatment Peptides for Skin For Hair Pattern and Thickness : Amazon.ie: Beauty