Smokers aren't known for having healthy teeth, given the discoloration and residue left by tobacco. But even those around smokers may face an increased risk of tooth decay from exposure to secondhand smoke,
found a study published last month in The BMJ
Researchers based in Japan analyzed health data for 76,920 children born between 2004 and 2010 and living in Kobe City. Children in households with smokers were one and a half times more likely to have cavities than those without them.
Those results, however, could be influenced by other factors, and the researchers stress they can't prove causation.
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