Garnier Fast Bright Vitamin C + Niacinamide Booster Serum has 30x Pure Vitamin C. Tired of dull skin, pigmentation, and dark spots? Breathe new life into your skin and get a bright, spot-less complexion with Garnier Fast Bright Vitamin C + Niacinamide Serum. This Vitamin C + Niacinamide serum is an anti-oxidant rich face serum improves skin brightness and evens skin tone from first application and reduces dark spots in just 3 days. Experience fast and visible results with the Garnier Fast Bright Serum.