PureCeuticals Ferulic C Antioxidant Serum is infused with 20% L- Ascorbic Acid (Vitamin C), 0.5% Ferulic Acid and Vitamin E, a blend of potent antioxidants to protect against environmental damage, reduction of lines, while firming and brightening. Naturally derived fruit extracts aid in cellular interaction and encourage collagen synthesis. Gently exfoliating Malic Acid offers a greater penetration of Vitamin C and active botanicals, which enhance the benefits of this age reversing serum. Perfect for all skin types. pH 3.5.