The Ordinary Niacinamide 10% + Zinc 1% is a high-strength vitamin and mineral serum formulated to reduce blemishes and improve skin texture. This water-based formula contains 10% niacinamide (vitamin B3) and 1% zinc PCA to help control sebum production, minimize pores, and enhance overall skin clarity. This product should be applied morning and evening before heavier creams. While it can help with the appearance of blemishes, it is not a treatment for acne. The formula should not be used simultaneously with vitamin C products - if using both, apply at different times of day. A patch test is recommended before first use. The product comes in a dropper bottle format for precise application. If irritation occurs, discontinue use and consult a physician.