GHK Copper Peptide GHK Cu Tripeptide 1 Peptide Reset Duo Featuring our best selling Copper Peptide Serum + our newest drop: Argireline & Matrixyl Serum Together, they're your full peptide routine one to support skin repair + glow, the The Peptide Power Duo your skin will thank you for. Argireline + Matrixyl targets the look of fine lines and expression lines, while GHK Cu Copper Peptides help support skin renewal and firmness. Retinoids vs Peptides (Matrixyl CP): what to pick + how to pair, Effectiveness: Retinoids (retinol tretinoin) have the strongest clinical data for photoaging (wrinkles, texture, tone). Peptides GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? Copper Peptides for Oily, Dry & Sensitive Skin Glimmer Goddess