MDPen C + E Brightening Serum contains two forms of Vitamin C as well as Vitamin E to help to build collagen, defend against free-radicals, and reduce the appearance of fine lines and wrinkles. Our formula also contains hydrators like Hyaluronic Acid; powerful antioxidants from Green Tea; and brightening agents including Licorice Root, Dicrateria Rotunda, and Ruttnera Lamellosa Oil. The Fruit Acid Complex of naturally occurring alpha-hydroxy acids (AHA) brightens and gently exfoliates for smoother, younger-looking skin.