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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Mathew Palmer, a former Delta Air Lines employee, at his home in Atlanta on Thursday, Oct. 9, 2025.  Palmer was fired less than two weeks after writing a post on social media about the assassination of conservative activist Charlie Kirk. (Natrice Miller/AJC)