Drinking milk alone may not help to keep your teeth white, but it can help to strengthen your teeth and maintain their health. Milk contains calcium and other minerals that can help to strengthen tooth enamel, which is the protective outer layer of your teeth. However, if you want to maintain or improve the whiteness of your teeth, it's important to practice good dental hygiene, such as brushing your teeth twice a day, flossing daily, and visiting your dentist regularly for check-ups and cleanings. You may also want to avoid or limit your intake of foods and drinks that can stain your teeth, such as coffee, tea, red wine, and dark-colored sodas. If you're looking for a natural way to whiten your teeth, you may want to try brushing with baking soda or using activated charcoal. However, it's important to use these remedies with caution, as overuse can damage your tooth enamel and cause sensitivity. It's always a good idea to talk to your dentist before trying any new dental remedies.