Discover the 10 best dermatologist-recommended niacinamide serums for brighter, calmer, and smoother skin. All were rigorously tested, and these are our top picks to combat dullness, oiliness, and ...

If skincare was a popularity contest, niacinamide (the water-soluble form of vitamin B3) would likely have a seat with the cool kids. It's one of the few topical cosmetic ingredients proven to work, ...