GHK Cu for Skin: SIGNAL's Guide to Rejuvenation I've had @sumanurica in my routine for almost a year now, so adding the new GHK Cu Repairing Serum felt like the perfect next step It's lightweight, calming and layers beautifully, especially GHK Cu Repairing Serum 0.99fl. oz 30ml SumaNurica How to Maximize GHK Cu Peptide Results with Micro Infusion Celebrity Esthetician Secrets GHK Cu, the copper peptide, is a game changing injectable for radiant skin and so much more Here's what it can do: Boost collagen for smoother, firmer skin Anti aging