With all the conflicting research out there (is butter good for us or not??) it’s hard to know what to believe. Take, for instance, the idea that cranberries help prevent urinary tract infections — is that fact or fiction?

The tip is real, says Dr. Mary Jane Minkin, a board-certified OB/GYN at Yale University School of Medicine and member of PEOPLE’s Health Squad.

“There is definitely data showing a decrease in incidence of recurrent UTIs in women taking cranberries,” she tells PEOPLE, and points to the “over 400” studies in one medical database on the topic.

And while some of those original studies were non-conclusive, more recent research confirms that cranberry products can, indeed, lessen or eliminate UTI symptoms. One significant study, published in the Journal of Urology in 2017,

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