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, Essential GHK Cu Serum: What It Is, How It Works, and Why It Matters f Bacteriostaticwater.com GHK Peptide Injection and GHK Cu Benefits, Uses ,safety GHK Cu Focal Point Vitality Buy GHK Cu Peptide 50mg 100mg 99% Purity FREE Shipping