Hyaluronic acid and niacinamide serums are skincare products that are used to hydrate, brighten, and smooth the skin. Hyaluronic acid is a hydrating ingredient that helps the skin retain moisture, while niacinamide is an antioxidant that helps build ceramides, aids skin repair, and hydrates the skin. Niacinamide can also reduce fine lines, wrinkles, spots, and redness
. Some positive aspects of these serums include their ability to hydrate and brighten the skin, reduce fine lines and wrinkles, and strengthen the skin's natural barrier
. They are also lightweight and water-based, making them ideal for daily use
. Negative aspects of these serums are not mentioned in the search results. Other ingredients or materials used in these serums are not consistently mentioned across the search results. However, some products are vegan, fragrance-free, and cruelty-free
