GHK Cu Copper Peptide HPLC Tested Peptide Warehouse 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 Lets talk GHK Cu , GHK Cu is a naturally occurring copper peptide that supports:, Collagen production, Tissue repair, Skin rejuvenation, Reducing Inflammation , Healthy aging, As levels GHK Cu Copper Peptide Benefits, Uses & Safety Intra V