Brush it with baking soda -Baking soda has natural whitening properties, which is why it’s a popular ingredient in commercial toothpaste Strawberries-Whitening your teeth with a strawberry and baking soda mixture is a natural remedy .Proponents of this method claim that the malic acid found in strawberries will remove discoloration on your teeth, while the baking soda will buff away stains. Fruit peels-Rubbing orange, lemon, or banana peels on your teeth is claimed to make them whiter.