Many of us want a whiter smile, but are concerned about the chemicals in commercial whitening strips. Consider a healthy alternative: berries! Strawberries contain malic acid, which can help remove surface stains from teeth—safely and inexpensively.
Mash a strawberry into a paste using a fork, and blend with a bit of baking soda. Apply to teeth using a soft toothbrush, leave on for five minutes and then brush with toothpaste to remove the mixture.
(Note: both baking soda and the acid from fruit can be harsh on teeth, so do not use this mixture more than once per week.)