GHK Cu: Effective Anti Aging Skincare Ingredient Nugenyx 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 Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule The Blue Revolution: Why 1% Pure GHK Cu is the New Standard for Mature Pure & Cimple