Advanced GHK Cu Face Cream 2400mg 4% Firmer Skin Neurogan Neurogan Health Fermented rice+ Minoxidil 5%+ Copper peptide(GHK CU) for Women, Men, p Peptide GHK CU Cream Concierge MD 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