GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu Peptides Serum, Copper Peptides Serum for Face Tightening, Repairing, Collagen Boosting with Hyaluronic Acid Fragrance Free TikTok Shop how to do a ghk cu peptide before and after TikTok Shop 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,