SkinCeuticals Correct P-Tiox Serum is a potent antioxidant treatment designed to protect and brighten the skin. This 30ml serum combines a proprietary blend of antioxidants to defend against environmental stressors and free radical damage. The lightweight formula absorbs quickly, making it ideal for layering under moisturizers and sunscreen. Perfect for all skin types seeking enhanced radiance and a more even complexion. Apply a few drops to clean skin morning and evening for optimal results.