Teeth whitening using banana peel
Bananas are a fruit rich in potassium and magnesium, and these substances are very helpful in whitening teeth, so banana peel is a natural and effective teeth whitener.
Method:
Choose a ripe banana, with a yellow peel, not black. Open it and rub your teeth well with its inner peel, immediately after opening it. Rub for five minutes, and if you can more, the better.