Hydrate skin while improving uneven, dull skin tone with Neutrogena Hydro Boost+ Niacinamide Serum with 10% Niacinamide and Hyaluronic Acid. This face serum from a dermatologist-recommended brand revitalizes tired, dull complexions with a hydrating formula that combines 10% niacinamide, a form of vitamin B3 known to improve the look of skin tone, and hyaluronic acid, an essential hydrator found naturally in skin. From a dermatologist-recommended brand, this 10% niacinamide serum is ideal for all skin tones and types, and is fragrance-, paraben-, phthalate-, and dye-free. It's also not tested on animals. A great addition to any daily skin care routine, the face serum is easy to use. Apply a pearl-sized amount twice a day to cleansed face and neck, avoiding contact with eyes. Allow serum to fully absorb into skin and follow with moisturizer as needed.