Garnier SkinActive's Fast Bright Night Booster Vitamin C Serum features a potent 10% concentration of Vitamin C. Enriched with 10% Pure Natural Vitamin C and Hyaluronic Acid, this serum helps revitalize and brighten your skin overnight, by delivering the highest concentration of Vitamin C from Garnier yet. It effectively combats dark spots and visibly brightens dull, tired skin during the night when the skin is most receptive to renewal. After just three nights, your skin will appear brighter and healthier. With continued use, it helps diminish dark spots, reduce dullness, and smooth fine lines and unevenness, leaving your skin looking revitalized, brighter, and rested.