We all know how important a bright, white smile can be, when it comes to making a favorable impression. However, sometimes those pearly whites aren’t nearly as bright and white as they really could be. Whether it’s the result of smoking or years of drinking coffee, the chemical whiteners and cosmetic dental procedures available to remedy this can sometimes be a bit expensive. Fortunately, there are also a few foods that whiten teeth naturally, if you can make them a regular part of your diet.

Here are several foods that can whiten your teeth:

1.) Strawberries

Although you might think of strawberries as a great way to stain a white shirt, they can have a completely different effect on the color of your teeth. This is due to a special enzyme known as malic acid. To reap the benefits, simply mash up some strawberries and rub them on the surfaces of your teeth. Let it sit for about 5 minutes, then rinse out your mouth with some water. Be sure to brush and floss your teeth afterward though, so you can remove any sugars and acids that might linger behind and eat at the enamel.

2.) Crunchy Fruits and Vegetables

Crunchy fruits and vegetables work for a couple of different reasons. One of these is rather obvious, in that the abrasive texture of an apple or carrot can do a great deal to scrub stains off the surfaces of your teeth. The other reason is that they also increase your saliva production, rinsing away plaque with special enzymes that actually have detergent-like properties.

3.) Tart Fruits

Certain tart fruits like pineapples and oranges also work to increase your production of saliva, in much the same way as the veggies. However, you should be wary of using lemons and limes directly on your teeth, since they are actually acidic enough to do more harm than good.