You may not have to spend lots of money for teeth whitening products if you have a particular tree growing in your yard. This wonder product is walnut tree bark. Take the bark off the tree, wash it off and then rub it over your teeth. It can take off plaque and stains.
Use baking soda to brush your teeth. This is a natural substance that can help whiten teeth. However, take care to brush gently, so the baking soda doesn't irritate your gums.