GHK CU Copper Peptide Face Serum Robyn's Tack Room ROBYN'S TACK ROOM GHK Cu 50mg Peptide Sciences, Powder, Packaging Type: Bottle at 6500.00 box in Nagpur 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 Revival Clinic Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3 Dr. Brenner Labs