Ghk cu and Ahk cu Copper Peptides Hair and Scalp Elixir 2oz Natural Haircare Peptide Skincare Leave in Hair Serum Etsy Ireland Neurogan GHK Cu Copper Peptide Hair & Scalp Serum 2400mg, 4% Copper Peptides eBay Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum Small molecules. Powerful results. Experience Peptide Power with Hairgenetix's advanced Copper Peptide Hair Growth Serum, formulated with 10% GHK Cu and 5% AHK Cu to support hair health at the follicle level. Helps Neurogan Copper Peptide Hair Scalp Serum for Fuller Softer Shinier Hair Walmart.com