TOSOWOONG Niacinamide 10% Arbutin 7% Serum is a concentrated treatment formulated to address hyperpigmentation, dark spots, and uneven skin tone. This serum combines 10% niacinamide with 7% arbutin, two ingredients known for their roles in reducing discoloration and supporting a more balanced complexion. Niacinamide supports skin barrier function and helps regulate sebum, while arbutin gently inhibits melanin production for gradual brightening. The absence of harsh active ingredients makes this serum suitable for all skin types, including sensitive and acne-prone skin. Its lightweight, water-based texture absorbs quickly without leaving a sticky or greasy residue, making it easy to layer under moisturizer or sunscreen. Developed within the Korean skincare tradition, this formula focuses on achieving a clear, refined texture often described as glass skin. The 33ml / 1.11 fl. oz. bottle is designed for consistent daily use. Regular application can help fade existing dark marks and prevent new ones from forming, though results vary by individual. The serum is free of artificial fragrances and coloring, reducing the risk of irritation. It works well as part of a broader skincare routine that includes cleansing, toning, and sun protection. This product is not a quick fix but a supportive step for long-term skin tone correction. For optimal outcomes, apply a few drops to clean, dry skin in the morning and evening, followed by a moisturizer. With its straightforward ingredient list and moderate price point, this serum offers a accessible option for those looking to address discoloration without complex layering. As with any active skincare product, patch testing is recommended before full-face application.