CAREFUL: If you are looking for otc products, most likely there is no active whitening agent in it. (read the label.) the label "whitening" is mostly from your brushing teeth well to get rid of any food stain ; yellowing bacterial build-up. Please be careful; do not use abrasive tooth paste for more than a few times, as the abrasive particles in paste can damage the tooth/root surfaces permanently.
Answered 11/29/2013
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