Best Anti Aging Serum for Firmer Face: 3% GHK VIP Luxury Serum Cosmetics with Copper Peptides Organic Skin Care Products to Look Younger Shop Skin Biology Skin Care Company Dr. 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 Copper Peptide Scalp Therapy Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. GHK Cu Nasal Spray, 90mg, High Purity, Tested