If you've toyed with the idea of whitening your teeth but haven't actually done the deed, consider this: "Since teeth naturally yellow as we age, whitening them will automatically make you look younger," says Kim Harms, D.D.S., a practicing dentist and a spokesperson for the American Dental Association. What's more, a 2008 Columbia University study found that women with healthier-looking teeth earn more than those with less sparkling grins. Do you need any more reasons to whiten up?
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