8. Bark of Walnut Tree or Wood Ash - Home Remedy To Whiten Teeth Naturally

Bark of Walnut Tree or Wood Ash - Home Remedy To Whiten Teeth Naturally

The bark of walnut tree and hardwood ash contains potassium hydroxide, an effective teeth whitener. You should rub your teeth with it after brushing the teeth and it helps in removing all stains from teeth. You could also try hardwood ash. While the bark of walnut tree and hardwood ash are one of the best teeth whitening cure, however, using wood ash too often or scrubbing it hard can wear down your tooth enamel over time and this has to taste awful, so we do Not Recommended.