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Some fruits can naturally whiten your teeth. Strawberries are great for whitening. You can rub them on your teeth or mash them up into a paste, brush them on, and leave them for about five minutes. Rinse your teeth well. Orange peel is also good for whitening. You can rub it directly on the teeth. Another natural fruit tooth whitener is lemon juice and salt mixed together.
To whiten teeth without spending a small fortune, try creating your own teeth whitening solution at home. Combine baking salt with salt and then apply the mixture to your teeth, rubbing it onto all tooth surfaces. This solution helps kill plaque-causing bacteria and also the bacteria which can harm tooth enamel.