Create a toothpaste of two parts baking soda to one part hydrogen peroxide. Brush your teeth with this paste. Rinse afterward.
Dip your toothbrush in apple cider vinegar and brush your teeth daily to help whiten them.
Mash a strawberry with a fork and dip your toothbrush into it. Brush your teeth with the strawberry pulp, which will act as a natural whitener, notes frugallyminded.com. Brush with toothpaste afterward to remove sugars from the fruit.
Peel an orange. Position part of the peel so that the white inner portion of the peel is facing your teeth. Rub this part of the peel on your teeth to help whiten them.