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report published in the latest issue of the Journal of the Public Library of Science, sugar-free chewing gum is effective in cleaning the mouth, but should not be chewed for long periods of time.Researchers at the University of Groningen in the Netherlands asked volunteers to chew gum at different times, then used an electron microscope to detect the gum they vomited, and found that chewing was the most effective at
30,
seconds to remove bacteria, then gradually weakened, but the total number of bacteria removed increased over time, chewing an average of
1
billion bacteria on
10
minutes of chewing gum.if you continue to chew, some bacteria that had previously stuck to the gum re-entered the mouth.researchers stress that only sugar-free chewing gum has the effect of removing bacteria, but sugary chewing gum can "feed" oral bacteria.