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 50mg vial Do you know your skin has a built in "Biological Architect"? It's called GHK Cu (Copper Tripeptide 1), and its only job is to tell your cells one thing: REBUILD. It's why your skin snaps GHK Cu 50mg Third Kind AHK CU + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan