Coffee, wine and sweets are foods and drinks that tend to stain our teeth. To counter that, and make your teeth whiter, try adding strawberries to your diet.

Dr. Irwin Smigel, president of the American Society for Dental Aesthetics said that strawberry's malic acid is a natural astringent that removes surface tooth discoloration. You can also combine strawberries with baking soda for a natural tooth whitener though you should be doing this more than once a week because you might run the risk of enamel damage.

Here are some other foods that will naturally whiten your teeth:

Seeds and nuts

Hard foods rubs plaque and stains off the surface of teeth, says Dr. Matthew Messina, and they're full of protein, healthy fats, and the crunch you need to get pearly whites.

Onions

The notoriously bad-for-breath alliums could be beneficial to teeth because they won't cause surface stains.

Apples

Apples' crispiness strengthens gums, and the high water content increases saliva production, dispersing and neutralizing colonies of bacteria that lead to bad breath.

[Redbook/Yahoo!]