GHK cu is a copper peptide. It's great for skin, especially when you combine it with other things. My favorite is DMSO and derma rolling. My first experience with copper peptides was Procytes GLOW 2.0 Transdermal Cream from Elite Research is now available BPC 157 500mcg KPV 500mcg GHK Cu 2mg DMSO 2% Use the link with code YUKON10 to save 10% off your entire order Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms GHK CU Crepey Skin Escape GHK Cu (100mg) Research Peptide Kindred Aminos GHK cu is a copper peptide. It's great for skin, especially when you combine it with other things. My favorite is DMSO and derma rolling. My first experience with copper peptides was Procytes