Brown color. Brine, or betel nut brine, is a brown colored slurry obtained by a thermal reaction between calcium hydroxide and caramelized sugar. Usually in this slurry, sweeteners are also added as well as a variety of edible flavors and fragrances. Tea selenium betel nut brine has a unique flavor, good taste, can be very good to improve the chewing betel nut in the process of more likely to appear in the grinding mouth, burning mouth phenomenon.