We've harnessed the power of the supernutrients vitamin B3 (niacinamide) and vitamin C to refresh your complexion. A single drop has the power to visibly renew a million skin cells. With daily use, you'll see noticeably brighter skin on day 1 and a more even skin tone in just two weeks. To use, apply several drops to cleansed skin, then seal your skin with your favorite Olay moisturizer. This fragrance-free serum absorbs quickly and cleanly without leaving the skin feeling greasy. No parabens, phthalates, mineral oil, or synthetic dyes. So cheer up the buttercup! VITAMIN B3 (NIACINAMIDE) Our favorite ingredient in Olay is vitamin B3. This ingredient is known to help the skin retain moisture keeping it seriously hydrated. Vitamin B3 can also moisturize to help with the renewal and regeneration of surface skin cells, as well as exfoliate to remove dull skin. Long story short, it's our unicorn. VITAMIN C is a natural antioxidant known to fight free radicals. This vitamin C-infused formula ultimately reduces visible damage you see in the mirror, like fine lines and uneven skin tone.