Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3 Dr. Brenner Labs GHK Cu is a naturally occurring copper binding peptide that plays a major role in tissue repair and remodeling, with a strong focus in research on skin and hair biology. It works by signaling GHK CU Program Calibrate Hydration The Glow Peptide Protocol: Enhance Your Skin's Vitality And Radiance Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. Westend Medical Supply