NUMBUZIN No5 Vitamin Concentrated Serum is a powerful brightening and spot-correcting formula made for dull, uneven skin tone. This lightweight serum features a highly concentrated blend of Glutathione, Tranexamic Acid, and Niacinamide to help fade pigmentation and dark spots while restoring natural radiance. It absorbs quickly into the skin without leaving a sticky finish, making it ideal for both day and night use. Safe for sensitive skin and designed to improve tone and clarity with regular use.