GHK Cu Copper Peptide 0.5% (topical foam) Shell Medical Neurogan Health Copper Peptide GHK CU , 120 mcg, 60 Tablets, 0.52 oz (15 g) eBay This peptide reverses aging, And its been hiding in plain sight for decades., GHK Cu (Copper Peptide) is one of the most researched anti aging ingredients out there., Heres what it does:, Copper peptides like GHK Cu work by sending signals to your skin to repair, regenerate, and produce collagen., Its not about instant results, its about improving how your skin functions over time.,