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 Advanced Copper Peptide Serum 300mg High Purity (99.6%) GHK Cu Mul Sapnne Naturals Oligopeptides are having their moment and we've known their power all along. Featured in NewBeauty. #KeraFactor #Oligopeptides #NewBeauty #ScalpCare Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience