Inspired by professional treatments, it rapidly brings radiance and luminosity to dull, lackluster skin. Targets the appearance of multiple types of spots and uneven skin tone. Anti-oxidants help protect against environmental damage and the formation of new skin discolorations. Reveals the look of more even-toned, dewy, glowing skin. Inspired by professional treatments, this Vitamin C-powered serum rapidly ignites skin's radiance and targets multiple types of dark spots to reveal a more even-toned look. With its exclusive complex of radiance-boosting actives, this Ferment plus Vitamin C serum helps CALM skin so it can help resist irritation-induced dark spots. Helps BREAK the cycle of dullness. Helps BLOCK the appearance of future dark spots with powerful anti-oxidants. And helps BOOST an undeniable clarity. What is Ferment? A powerful triple-ferment combining a high concentration of our exclusive Yeast Ferment with a spot-targeting Molasses Ferment plus a proprietary Algae Ferment with powerful soothing activity. All three ferments work to help reduce the appearance of dark spots and enhance clarity and calm for glowing skin. Estee Lauder scientists are experts in fermentation, a process that concentrates and amplifies an ingredient. Our ferment complex is 98% naturally derived. (5) What is Vitamin C? It's a renowned radiance-boosting, anti-aging, and skin-boosting active. This Rapid Brightening Ferment + Vitamin C serum targets dark spots in the deepest layer of the skin's surface to help reduce the look of skin discolorations. And with its anti-oxidant properties, it helps prevent the appearance of new spots and skin discolorations. The fast-absorbing formula of the Rapid Brightening Treatment helps smooth skin's texture and enhance the natural radiance of your glowing skin. With anti-irritants and a potent dose of Hyaluronic Acid, this Ferment + Vitamin C serum infuses skin with plumping, soothing, 48H moisture. Anti-oxidants help protect against environmental damage and the formation of new skin discolorations. Oil-free. Gentle on all skin types. How to use: For radiant, glowing skin that looks more even-toned, apply Rapid Brightening Treatment on clean skin before your moisturizer, AM and PM. Avoid eye area.