7. Banana peel
Another fruit to help you whiten your teeth! The inside part of a banana peel is full of great vitamins and minerals like potassium, magnesium and manganese, which have been found to help lessen stains on your tooth enamel. Rub the peel on your teeth for a few seconds, let it sit for 10 minutes (keeping your lips away from your teeth so you don’t remove it), then brush your teeth.