The Ordinary Niacinamide 10% Zinc 1% 1 piece x 60 ml. Smoothing and Brightening Serum for Blemish-Prone SkinNiacinamide 10% Zinc 1% Serum is a water-based formula that provides multiple benefits of niacinamide to increase skin brightness, improve texture and strengthen the skin's moisture barrier. This niacinamide (vitamin B3) serum contains a high concentration (10%) as well as zinc PCA to combat dullness, uneven texture and excess oil. Niacinamide 10% Zinc 1% also helps to reduce the appearance of pores and instantly improve skin radiance.