According to board-certified dermatologist Hadley King, M.D., there are eight B vitamins, and as a group they are called B-complex vitamins. But when it comes to skin care, there’s one that steals the show: Vitamin B3, otherwise known as niacinamide. Ahead, we dive deeper into the topical skin benefits of vitamin B3: However, there’s no need to be worried. It’s always a good practice to apply any new product on a small patch of skin before applying all over the face to ensure there are no reactions. Otherwise, you can purchase any product formulated with vitamin B3 and add it into your daily skin care routine.