There are other ways to keep your teeth white
Maybe you don’t want to pour money into products, and have heard about homemade whitening formulas with lemon juice, baking soda, or crushed strawberries. Not the best idea, say experts, as they bathe teeth in acid. “You can end up with more sensitive teeth, and lose some tooth structure,” says Ward. To keep your teeth white without paying for it, brush soon after consuming stain culprits like coffee, red wine, tea or blueberry pie. Try adding dairy or soy milk to your tea or coffee instead of taking it black. And if you smoke, quit: Stains caused by cigarettes are almost impossible to remove.