As mentioned above, milk is a great source of calcium and calcium is great for teeth. Milk helps prevent your teeth from decaying and prevents cavities as well so that an added bonus. What's more, it also helps prevent discoloration. Sri Lanka is the world's largest exporter of tea in the world. Therefore, it's no surprise that tea is the number one choice when it comes to beverages in Sri Lanka. But here's the catch, this delicious cuppa is an enemy to your pearly whites as tea contains tannins which are a type of chromagen (intensely pigmented molecules) that are largely accountable for its unique flavour and colour. As amazing as it is as a flavour, tannins make your teeth enamel much more vulnerable to staining.
Don't worry; you don't have to give up tea. According to a study published in the International Journal of Dental Hygiene, by adding milk to your tea reduces the effect of staining as it features a protein called casein, which combine with tannins and diminish dental discoloration.