1% GHK CU solution: is this applied directly on skin or diluted further? : r DIYaesthetics Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with GHK Cu 100MG NuRev Peptides Shed Copper Peptide Hair Growth Serum Take an Rx approach to hair health GHK Cu Copper Peptide Neck & Face Serum GHK Cu 100mg 99% Purity Skin Repair Research Peptide