Pro micro-retinol essential serum, 1 ounce - pevonia micro-retinol essential serum is a clinical-strength serum specifically designed to enhance and transform mature skin types. Formulated with pevonia" s micro-retinol technology, retinol is delivered into the deep epidermal layers and immediately absorbed, strengthening cells and firming skin. Pevonia micro-retinol essential serum protects skin against damaging free radicals while stimulating cellular renewal for a firm, even, healthy complexion.