A highly effective concentrate with 15% vitamin C, designed to firm, brighten the skin, and reduce signs of aging caused by sun exposure. Benefits: | Designed to be mixed by you before first use to maximize ingredient potency and keep the formula fresh Reveals a brighter, firmer, and more even complexion Significantly reduces the appearance of signs of aging and photodamage Formulated with a skin-friendly pH of 2.5. | 100% free from essential oils, silicones, fragrances/colorants, and solvent alcohols. Dermatologist tested.