GHK CU Apollo Peptide Sciences Organic Copper Peptide Anti Aging Serum GHK Cu, Argireline, Matrixy AwearMarket Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience HKH Copper Peptides Serum for Face 38 Caps Anti aging Facial Serum Capsules with Hyaluronic Acid Advanced Copper Peptide Serum 300mg High Purity (99.6%) GHK Cu Mul Sapnne Naturals 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