One of my friends said you can use salt or something to whiten your teeth but does it harm your teeth and is that true?
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no it does not work. go to your dentist and ask for zoom whitening, it whitens from the inside out giving you a great result. if you can't afford that try custom bleach trays, if that does not work for you try crest whitestrips. the bleach trays and strips only remove surface stains so the results are not as good as zoom.
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