Niacinamide 10% + zinc 1% is a water-based serum with niacinamide (vitamin B3) and zinc. Reduces the appearance of blemishes, redness, enlarged pores, uneven tone, and oily skin. It promotes clearer, brighter, and smoother skin while balancing sebum production. Key ingredients niacinamide: A vitamin that brightens and reduces the appearance of skin blemishes and congestion. Zinc PCA: A mineral that helps control oil production how to use apply a small amount to your face in the morning and at night before oils, moisturizers, and creams. This product should not be used at the same time as treatments containing pure vitamin C (ascorbic acid). Other details size: 30 mlpH: 5.5-6.5Cruelty-free vegan oil-free silicone-free.