Garnier Fast Bright 30X Vitamin C Serum is the most concentrated brightening serum, featuring the highest-ever concentration of Vitamin C and Niacinamide. This fast-absorbing serum is designed to visibly reduce dark spots and marks, leaving skin smoother, brighter, and more radiant from the first use. With regular application, skin becomes visibly brighter, and within just three days, dark spots show noticeable improvement. The formula includes 1% Vitamin C (Ascorbic Acid), a potent antioxidant that helps combat dark spots, and 2% Niacinamide (Vitamin B3), known for reducing the appearance of pores while providing hydration. Additionally, Yuzu and Lemon extracts, known for their natural brightening properties, work together to treat dark spots and promote an even, clear complexion making this formula the best rated dark spot corrector.