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, Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms AOD 9604 Dosage Guide: Complete Protocol for Safe Administration Beverly Hills Rejuvenation Center