Is it true that strawberries can make your teeth whiter?

I've tried whitening toothpaste, it worked for a while but now my teeth are going back to their usual colour. Do strawberries work?
--------------------
Hello...Here's the deal...all fruits that have high acidity content can to some degree whiten your teeth. However they do that by eating away at the surface of the teeth....I actually had a patient one time that had been an excessive lemon eater. She liked to slice a lemon in half, sprinkle the surface with salt and slowly suck the juice out of it...After a long time of doing this, the enamel was so damaged that she required Crowns and Veneers...and that was after dealing with several surface decayed areas. My advice is stick to professionally created tooth whiteners. Good luck and I wish you well.
Source