Medicube kojic acid tumeric brightening c mask 28ghe Medicube Kojic Acid Turmeric Brightening Gel Mask (28g) is a K beauty hydrating gel mask with kojic acid, turmeric, niacinamide, and sometimes gold retinol, designed to brighten skin, fade dark spots, even skin tone, and provide deep hydration for a luminous, glassy look, featuring a unique color changing gel that turns transparent as it absorbs, offering cooling effects and improving texture elasticity, suitable even for sensitive skin.