Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3 Dr. Brenner Labs Copper Peptide Firming Serum: Elasticity & Age Defying Dermaesthetics Beverly Hills Your skin knows GHK Cu. Your body makes it naturally, then makes less of it with age. We concentrated it. Three formulas. One peptide. Each paired with a single bioactive, chosen for a Oral Liposomal Copper GHK Liposomal GHK Cu Supplement