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 Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 This peptide reverses aging And it's been hiding in plain sight for decades. GHK Cu (Copper Peptide) is one of the most researched anti aging ingredients out there. Here's what it does: Boosts Unlocking the Secrets of GHK Cu: The Revolutionary Peptide for Youthfu 8 Weeks of GHK Cu Peptide: Before & After Results