How can I whiten my teeth
Try 1 ripe mashed strawberry and 1/2 teaspoon of baking soda. Let it sit on your teeth for 5 minutes, the brush them with regular toothpaste.
white part of an orange peel rub on tooth, it is slow but effective.
Take a banana peel (yes a banana peel) cut a small piece of it and rub the white inside part on your teeth. Leave it on for no more than 15 minutes. The minerals inside the peel such as potassium and bromine will naturally whiten your teeth without chemical damage (not proven).