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, GHK Cu: The Midlife Peptide Your Skin Has Been Missing (and Why It's Not Just About Wrinkles) Relished Food Holistic Nutrition What is GHK Cu and Why is Everyone Talking About It? GHK Cu (Copper Peptide) is a powerful, naturally occurring compound in the body that plays a key role in skin health Copper Peptide (GHK CU) Serum Australian Private Label Skin Care Cellular Cosmetics