The InstaNatural Niacinamide Serum is another top-rated facial serum on Amazon. It contains a high concentration of niacinamide, also known as Vitamin B3, which has been shown to help improve the appearance of enlarged pores, uneven skin tone, and fine lines. This serum also includes other beneficial ingredients like hyaluronic acid, avocado oil, and rosemary extract to provide hydration and nourishment to the skin. Users love how this serum helps to control oil production, minimize the appearance of blemishes, and leave their skin looking smoother and more radiant.