Copper Peptides For Skin: Benefits & Side Effects Minimalist Peptide Therapy for Anti Aging, Immunity & Wellness Miami Stem Cell Before you decide to begin using the copper peptide, GHK Cu, be aware it stings and leaves behind big, red welts that then leave a lovely bruise. In order to reap the 'glow' The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, Oral Liposomal Copper GHK Liposomal GHK Cu Supplement GHK Cu Scalp Solution Empower Pharmacy