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Re-activateHow many minutes do I need to brush my teeth to get the full fluoride benefit? —F.P., Morse, Texas
Fluoride toothpastes clearly reduce the risk of cavities, but studies have not determined the minimum brushing time needed for that benefit. In theory, brushing for at least two minutes twice a day should lead to sufficient fluoride absorption. And most people need at least that long to adequately remove plaque, which contributes to gum disease and tooth decay.
But don't exceed three minutes: Excessive brushing could damage the teeth, gums, and any exposed root surfaces.
For more on dental health, see our tips for cleaner teeth and our new report and Ratings on electric toothbrushes (subscribers only).
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