The Ordinary Niacinamide 10% + Zinc 1% is a water-based serum that targets blemishes, congestion, and sebum overproduction. It contains a high concentration of niacinamide (Vitamin B3) and zinc PCA to visibly reduce the appearance of skin blemishes, brighten skin tone, and balance sebum activity. This serum is suitable for all skin types, especially oily and acne-prone skin, and is designed to improve skin smoothness and reinforce the skin barrier