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 Peptide (50mg) Advanced Skin Rejuvenation & Healing Support GHK Cu 200MG (Topical) Raw Amino 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper Copper Peptide Regenerating Serum for Glowing Skin and Hair GHK Cu Injectable Team Wellcore