Cos De BAHA Skin 10% Niacinamide Booster Serum with 1% Zinc dramatically improves uneven skin tone, refines skin texture, improves fine lines, has overall brightening effect, effective against acne and post-acne red spots. Promotes a brighter, younger-looking appearance Niacinamide (vitamin B3) visibly minimizes pore size Light liquid formula Add it to your moisturizer or serum or use alone Vitamin B3 Serum helps in firming your skin and restoring moisture, leaving you with protected and hydrated skin that feels smoother and supple all day.