Paula's Choice C15 Super Booster is a concentrated formula that helps to dramatically brighten uneven skin while improving the appearance of dark spots, wrinkles, and fine lines. Powered by 15% pure vitamin C, ferulic acid and vitamin E, combined, they improve the appearance of uneven skin tone, brightening a dull complexion and helping skin ward off the impact of environmental damage. Key Ingredients: Vitamin C: restores skin's youthful radiance and corrects uneven skin tone Vitamin E and Ferulic Acid: potent antioxidants that fight signs of aging and protect against environmental stressors Hyaluronic Acid: restores skin's moisture barrier and locks in hydration Key Benefits: Brightens a dull complexion and fades brown spots Improves the appearance of fine lines and wrinkles Fights the impact of environmental stressors and free radicals