SkinCeuticals Serum 10 AOX+ is formulated to help restore healthy-looking skin while minimizing the appearance of fine lines and wrinkles. Ideal for those with sensitive skin types or those new to vitamin C antioxidant serum, this powerful serum combines 10% pure vitamin C (l-ascorbic acid) and 0.2% ferulic acid to help neutralize damaging free radicals that contribute to environmental damage and premature signs of aging. Key Ingredients: 10% L-Ascorbic Acid: this highly potent form of pure vitamin C helps neutralize free radicals and protect against oxidative stress while providing visible anti-aging benefits 0.2% Ferulic Acid: a plant-based antioxidant, ferulic acid neutralizes free radicals and enhances the antioxidant benefits and stability of vitamins C Key Benefits: Neutralizes free radicals, defends against environmental damage and helps to fight the appearance of accelerated aging Lightweight and fast-absorbing Reduces the appearance of fine lines and wrinkles and helps restore healthy-looking skin Paraben-, fragrance-, alcohol-, and dye-free Ideal as an introductory antioxidant serum for all skin types, including sensitive Tip: It is normal for vitamin C products to darken after opening due to air and light exposure. The formula will remain effective. Once opened, it is recommended to be used within 3 months of opening.