A super-potent 15% vitamin C serum that firms, brightens, and improves signs of photoaging.Designed to be mixed by you before its first use to maximize the ingredients’ potency and keep the formula fresh.Reveals a brighter, firmer, and more even-looking complexion.Noticeably diminishes the appearance of signs of aging and photodamage.Formulated at a skin-friendly pH of 2.5100% free of essential oils, silicones, fragrance/dyes, and solvent alcohols.Dermatologist tested.