SkinCeuticals' C E Ferulic features a synergistic antioxidant combination of ferulic acid and pure vitamin C and E to enhance your skin's protection against environmental damage caused by free radicals. In addition to antioxidant protective benefits, this formula improves signs of aging and photodamage to reduce the appearance of lines and wrinkles while firming and brightening your complexion. Lastly, this powerful formula helps neutralize free radicals induced by UVA/UVB, infrared radiation (IRA) and ozone pollution (O3). Key Ingredients: 15% Pure Vitamin C (L-Ascorbic Acid): provides visible anti-aging benefits, brightens skin and helps protect against oxidative stress 1% Vitamin E (Alpha Tocopherol): this pure form of vitamin E neutralizes free radicals and replenishes skin lipids 0.5% Ferulic Acid: a plant-based antioxidant, ferulic acid neutralizes free radicals and enhances the antioxidant benefits and stability of vitamins C and E Key Benefits: Provides advanced environmental protection from skin-damaging free radicals caused by sun and pollution Clinically proven to reduce combined oxidative damage from free radicals generated by UV, ozone, and diesel exhaust by up to 41% Improves the appearance of fine lines, wrinkles and loss of firmness Evens and brightens skin tone Once absorbed, this vitamin C serum can remain effective for 72 hours Paraben-free and ideal for normal, dry, and sensitive skin types Tested suitable for use post-laser; Always consult with a physician for individual post-procedure care Please note: L-ascorbic acid may discolor with time, but oxidation is minimal and the formulation is proven to remain effective. All SkinCeuticals antioxidant formulations have been tested in final packaging and have been confirmed to remain stable and effective for 36 months and up to 6 months after opening. This product is featured in: New to SkinCeuticals? Here Are the Top 6 Products You Have to Try. Learn more on the blog: Why we in the Dermstore office love it so much! Allure Best of Beauty 2021 Winner: Best Facial Serum (Antioxidant)