Estelin Niacinamide Whitening Toner 400ml brightening toner formulated with 10% niacinamide, alpha-arbutin, to target hyperpigmentation, dullness, and uneven skin tone. It aims to fade dark spots, refine pores, boost collagen, and hydrate skin. It is a gentle, pH-balanced, and fragrance-free formula suitable for sensitive and acne-prone skin.