Niacinamide, also known as vitamin B3, is a popular ingredient used in many skincare products. It has been widely studied for its potential to lighten the skin and improve overall skin health. Niacinamide can reduce hyperpigmentation caused by sun damage, acne scars and melasma. Additionally, it can help protect against UV damage and increase collagen production which helps make the skin look brighter over time. While niacinamide won't necessarily lighten your skin tone overnight, it may gradually provide more even-toned results when combined with other active ingredients like Vitamin C or Kojic Acid.