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 Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu: Effective Anti Aging Skincare Ingredient Nugenyx GHK CU 50mg Vial Copper Peptide Pure Bio Labs