Niacinamide 10% + Zinc 1% is a water-based serum with Niacinamide (vitamin B3) and zinc. This treatment reduces the appearance of blemishes, redness, enlarged pores, uneven skin tone and oily skin. It promotes clearer, brighter and smoother skin while balancing sebum production. Niacinamide brightens and reduces the appearance of skin blemishes and congestion Zinc PCA helps control oil production Evens out the complexion How to use Apply a small amount to your face in the morning and evening before using oils, moisturizers or creams. This product should not be used at the same time as treatments containing pure vitamin C (ascorbic acid).