Sunday Riley says you can expect to see brighter, more even-looking skin tone in as little as seven days with its 'C.E.O. Afterglow Brightening Vitamin C Cream.' This lightweight formula is enriched with THD Ascorbate, a precursor of Vitamin C, to smooth and illuminate, while Sodium Hyaluronate locks in moisture, leaving your complexion glowing and feeling hydrated and refreshed. The gel texture absorbs instantly, so it'll work well under makeup as a primer, too.