GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has AHK CU + GHK CU Hair Serum Pro Neurogan + Health GHK CU Copper Peptide Hair and Scalp Serum PrettyStick Factory Price Ghk Cu Copper Peptide Hair Growth Serum Scalp Repair Hair Regrowth Blue Copper Peptides Hair Care Serum