GHK cu Copper Peptide: The "Glow" for Hair & Skin Seenergie PH 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 Copper Peptides for Hair Loss: How GHK Cu Can Stimulate Hair Growth HapiPatch Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience