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 Nasal HyTydes GHK Cu Topical Spray Wells Pharmacy Network GHK Cu: The Regenerative Peptide for Skin, Hair, and Healing Pulse & Remedy Revitalize your skin with the ultimate rejuvenation ally! GHK Cu Nasal Spray by Xenogenix delivers powerful copper peptide goodness to boost collagen, smooth fine lines & give you that youthful glow.