tooth decay and staining

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    General Health Charcoal toothpastes ‘don’t whiten teeth’ – BBC News

    Charcoal-based toothpastes, which claim to whiten teeth, are a "marketing gimmick" which could increase the risk of tooth decay and staining, says a review in the British Dental Journal. The charcoal products, which are increasingly popular, often contain no fluoride to help protect the teeth...