Discover the NEW Garnier Fast Bright 30X* VITAMIN C Booster SERUM, our most concentrated brightening formula with the highest ever concentrated* VITAMIN C & NIACINAMIDE. This fast absorbing essence works to visibly REDUCE DARK SPOTS & marks. On first use, skin is smoother, brighter and more radiant. With regular use, skin looks visibly brighter and in 3 days, spots look visibly reduced.