Teeth whitening products containing hydrogen peroxide can damage the tissue underneath and make them weaker


Hydrogen peroxide used in teeth whitening strips damages the tissue deep in the tooth and makes it weaker, a study has found.

Whitening kits have become a billion-pound-industry – but companies selling them have come under fire amid their emerging dangers.

Now, scientists have found the damage goes even deeper than the enamel, after tests showed the hydrogen peroxide strikes the dentin.

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