La Roche-Posay laboratories have developed the highest concentration yet of pure, soluble vitamin C at 10%, without compromising tolerance on a sensitive skin. The formula also contains vitamin E and hyaluronic acid, which work together with the vitamin C concentrate to boost collagen, protect against free radicals, and give an instant plumped and hydrated appearance. Once hydrated, skin looks more firm, wrinkles are reduced, and the skin complexion is radiant. Visible results in less than 10 days.