The secret sauce. Our Vitamin C, B, E, and Ferulic Serum is a comprehensive antioxidant super serum that provides unrivaled antioxidant benefits and additional hydration from Hyaluronic Acid and Sodium PCA. The scientific compatibility and enhancement that these selected ingredients provide help combat oxidative stress on multiple levels for a deeper, more satisfying treatment than any one ingredient on its own. Use daily followed by a moisturizer and sunscreen for best results.