Are your teeth stained from food / smoking / certain drinks, or are they just not gleaming white?
My dentist hates whitening toothpastes. He says that a lot of people who use them are damaging their teeth, because the colour they are trying to get rid of is the natural colour of the enamel.
I'm not sure if whitening strips work in the same way as the toothpastes, but it's something worth looking in to.
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