Do home kits work?

Prima (UK) - - Best Of Health -

Home whiten­ing kits can only con­tain up to 0.1% per­ox­ide by law, which won’t have much ef­fect; den­tists can use up to 0.6%. Trays not tai­lor-made will not fit as well, so there’s a higher chance that the bleach can leak onto the gums, caus­ing sen­si­tiv­ity, warns Pro­fes­sor Damien Walm­s­ley. How­ever, his main con­cern is that over-the­counter kits have been found to con­tain sub­stances that can dam­age teeth.

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