If you've tried them, please write if they worked for you or didn't work. Also, how long do the whitening effects last? Do they make your teeth sensitive - for how long? How often do you need to use them to keep up the look and at the same time not to damage teeth? How much do they sell for?
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Commercial tooth whiteners use hydrogen peroxide and are expensive and inconvenient. A cheap and natural tooth whitening home remedy uses few strawberries but certain precautions have to be taken.I found the information at http://tinyurl.com/ep7yg
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