Oubo's hydrating face toner with vitamin C is a dual-action formula that combines hydration with brightening. The toner features 5% stable vitamin C (sodium ascorbyl phosphate), which converts to active vitamin C on the skin, reducing dark spots and promoting collagen synthesis. Hyaluronic acid (3 different molecular weights) provides multi-level hydration, while glycerin locks in moisture. The vitamin C also acts as an antioxidant, protecting against pollution and UV damage. This toner is pH-adjusted to 3.5 to optimize vitamin C efficacy without irritating the skin. Users notice brighter, more even skin tone after two weeks, with 78% reporting reduced dullness. The lightweight texture makes it suitable for all skin types, and it can be layered with other vitamin C products for enhanced results. A must-have for those seeking hydrated, glowing skin with antioxidant protection.