Numbuzin No.5 Vitamin Concentrated Serum is a brightening face serum for all skin types. An intensive ampoule designed for chi who desire brighter and more even skin. No.5 Vitamin Concentrated Serum harnesses the power of Glutathione, a brightening ingredient that helps reduce hyperpigmentation and improve skin tone, also providing antioxidant action. Enriched with Niacinamide, this formula not only gives radiance, but deeply hydrates the skin, leaving it healthy, radiant, and visibly more even-looking.