Niacinamide, also known as vitamin B3, is a water-soluble vitamin that plays a crucial role in maintaining healthy skin. It helps improve the skin's barrier function, which can reduce moisture loss and enhance hydration. Additionally, niacinamide is known for its anti-inflammatory properties, making it beneficial for conditions like acne and rosacea. In skincare products, niacinamide is often included for its ability to brighten the skin and even out skin tone. It can also help minimize the appearance of pores and fine lines, making it a popular ingredient in serums and moisturizers aimed at improving overall skin texture and appearance.