10% Vitamin C + E Ferulic Acid Serum combines powerful antioxidants and hydrating ingredients to brighten dull skin and reduce the signs of aging. A gentle version of our Best Seller 20% Vitamin C + E Ferulic Acid Serum, it is recommended for all skin types, including sensitive skin. This 10% concentration of L-ascorbic Acid will help restore dull, discolored, and stressed skin, while providing 24/7 protection against environmental pollutants.