GHK Cu Serum PLU Labs Copper Peptides Serum for Face 2% Copper Peptide with 4% Epidermal Growth Factor (EGF Serum) Niacinamide Ceramides Squalane & Hyaluronic Acid Multi Custom Logo Best Ghk Cu Facial Essence Firming Lift Anti Aging Lightening Dark Spot Pigment Copper Peptide Face Skincare Serum Copper Peptide Firming Serum: Elasticity & Age Defying Dermaesthetics Beverly Hills 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