GHK Cu Copper Peptide Skincare Bundle RegenMed Direct People are searching for the GHK Cu pen. Ordering it online. Trying to figure out how to use it safely at home. We looked at all of that and thought: there has to GHK Cu Copper Peptide Serum with Niacinamide, Hyaluronic Acid and Mushroom Extract 1% Copper Tripeptide 1 Anti Aging Formula, 1 oz GHK CU Copper Peptide Face Serum Robyn's Tack Room ROBYN'S TACK ROOM