Not teeth whitening kits just daily toothpaste, I've heard some can weaken the enamel of your teeth? xx
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Toothpastes mainly consists of 2 ingredients --- a whitening agent like carbamide peroxide or sodium tripolyphospate and an abrasive agent like silica (or calcium carbonate or dicalcium phosphate). Whitening agents do not actually have much effect on teeth whitening since the contact time with the teeth is very less. Abrasives is what actually that helps in removing the stains on the teeth and whitenign toothpastes have more of the abrasives as their content as compared to the ordinary toothpastes. But usage beyond limits can cause damage to the enamel since the silica like abrasies can actually keep peeling off the enamel even while removing the stains from the teeth. Long term usage of these toothpastes could weaken the enamel quite beyond acceptable limits which could lead to related complications.
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