GHK CU Drift Peptides GHK Cu Nasal Spray Before and After Results GHK CU NASAL Power Peptides Wholesale AHK CU + GHK CU Hair Serum Pro for your store Faire 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: Neurogan GHK Cu + AHK Cu Hair Serum Pro Lightweight Scalp Serum with Dual Copper Peptides Daily Hair & Scalp Use, Cosmetic Product : Beauty & Personal Care