About 12 percent of Americans experience migraines, and a new study published in the American Society for Microbiology suggests they could be caused by bacteria in the mouth.

Though previous studies have shown that increased nitric oxide in the bloodstream is associated with migraines, new research based on data from the American Gut Project sheds light on how foods with nitrates also may trigger migraines.

Watch the video below from Business Insider to find out which foods, like hot dogs, to avoid if you suffer migraines:

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Gwinnett County Fair takes place this weekend with carnival rides, livestock shows, a circus and more. (Photo courtesy of Gwinnett County Fair/Dustin Grau)

Credit: Photo courtesy of Gwinnett County Fair/Dustin Grau

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A rendering of the columbarium memorial that is estimated to be completed by next summer or fall in the southeast part of Oakland Cemetery, officials said. (Courtesy of Historic Oakland Foundation)

Credit: Historic Oakland Foundation