GHK Cu Copper Peptide Hair Tonic for Fuller Looking Hair 12 Week Supply (30 mL) Not all hair serums are built the same This one is powered by a dual copper peptide system GHK Cu + AHK Cu Designed to support: stronger feeling hair improved elasticity Ghk cu and Ahk cu Copper Peptides Hair and Scalp Elixir 2oz Natural Haircare Peptide Skincare Leave in Hair Serum Etsy Ireland R 10% Ghk Cu + 5% Ahk Cu Copper Peptide Hair Density Serum MOST EFFECTIVE Scalp Serum Hair Growth Factor 5% GHK CU Copper Peptide Rosemary