GHK CU Beverly Hills Rejuvenation Center Microlift Renewal Cream with GHKCu in Chicago Copper Peptide Collagen Cream at Better Med Spa GHK Cu Peptide Therapy for Skin, Hair & Cellular Repair in Houston, TX Vida Aesthetics and Wellness Defy GHK Cu (glycyl L histidyl L lysine) is a naturally occurring copper binding peptide found in human plasma. As levels decline with age, so may its support of the biological processes involved in collagen production, skin