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 Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B GHK Cu Spray (100mg Per Bottle) Modified Aminos GHK Cu 100mg 99% Purity Skin Repair Research Peptide GHK Cu 100mg (10 vials)