Do strawberries really whiten your teeth?

Yes: Strawberries have vitamin c that helps clear plaque as well as an astringent that helps with staining.

Yes: Strawberries contain malic acid, which is a type of astringent that decreases the appearance of stains on the surface of teeth. It interacts with teeth stains by oxidizing them, which works to lift discoloration and makes teeth appear to be brighter. Add some baking soda to scrub away residual stains.

I am not sure.: I have not seen any studies confirming this. The active ingredient in most professional whitening systems is carbamide peroxide. Whitening tooth paste systems work by adding more abrasives to remove more surface stains. I've seen strawberry/baking soda concoctions used as a paste along with hydrogen peroxide rinse. I caution this method due to the presence of fruit acids which may cause harm.