GHK Cu Hyaluronic Acid Gel Wells Pharmacy Network 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 GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Why Collagen Loss Accelerates After 40: The Role of GHK Cu in Menopaus Pure & Cimple