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, Copper Peptide Skincare Routine: How to Layer Peptides Glimmer Goddess Tripeptide 1 vs Copper Peptide: Key Differences & Uses Natural Micron Pharm Tech Topical Peptides in Skincare SumaNurica GHK Cu: The Elegant Copper Peptide for Skin and Scalp Renewal Renew Vitality GHK Cu 99%+ Pure Peptide Amino Club Amino Club