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"Wake up with fresh breath every day!" say print ads for SmartMouth. But does the mouthwash, $11.50 for a 15-day supply, really provide "12-hour fresh breath," as the ads promise? There's a "reasonable basis" for such claims, the National Advertising Division of the Council of Better Business Bureaus concluded in January 2008. But dental experts we consulted thought some of the key evidence a SmartMouth representative provided to back the claim was weak or indirect.
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In a four-week, double-blind, controlled clinical trial, 48 people were randomly assigned to rinse with one of three test formulas. So that morning breath could be analyzed, they fasted for 12 hours before testing. The result: The SmartMouth formula was the most effective. In some tests, no odor was detectable, researchers reported.
But the study, published in The Journal of Clinical Dentistry in 2004, was funded by Triumph ...