1% GHK CU solution: is this applied directly on skin or diluted further? : r DIYaesthetics GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration 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 All About GHK Cu Peptide More Than Just Cosmetic GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack?