GHK Cu: Skin Healing, Anti Aging, & Hair Growth Benefits GHK CU GHKCu (glycyl L histidyl L lysine copper) is a naturally occurring copper peptide found in the human body, particularly in plasma, saliva, and urine. It plays a key role in skin regeneration by promoting 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 Peptide Therapy for Pain Management and Healing Core Medical & Wellness GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B