Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 If you're into science that honors the Earth, this is the routine step I keep simple: Skin Perfection Copper Peptide as an easy add in to personalize your hydration base. My quick stack: Ghk cu Copper Peptide Repair Serum Firming, Collagen Boost, Skin Renewal, Anti aging Face Serum Etsy Skin Perfection GHK Cu Copper Peptide Serum Booster, 1 Percent Blue Liquid For Face, Neck, Body, Hair, And Scalp, 0.5 oz Walmart.com