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 100MG SSP Research Guys where do I find a legit source for this? Anyone try it? : r tressless ZQ II GHK Cu Copper Peptide Serum Manufacturer Anti Aging & Skin Repair GHK CU 50mg Vial Copper Peptide Pure Bio Labs GHK CU Shop