If your skin's been looking dull and feeling a little sensitive, this one's worth a try. The APLB Glutathione Niacinamide Ampoule Serum helps even out tone without messing with your skin barrier. Amazon.com: Cenffitio Glutathione Supplement Skin Brightening Formula with Vitamin C, Niacinamide, Licorice Extract, Collagen & Hyaluronic Acid for Skin Brightness, Radiance & Hydration 180 Tablets : Health & Household APLB Glutathione Niacinamide Ampoule Serum 30ml Combining Glutathione and Niacinamide for skin brightening can be extremely beneficial for your skin. Niacinamide helps reduce pigmentation and dark spots, whereas glutathione helps reduce melanin production, thereby lightening the dark spots