GHK Cu Peptide: What It Does for Body Composition and Metabolic Health What are the considerations and potential benefits of using GHK Cu (Glycyl Histidyl Lysine Copper) in a generally healthy adult female for skin health and hair growth? GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or 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 Peptide The benefits, side effects, and more [2026]