

Black licorice contains glycyrrhizin, which has been shown to cause high blood pressure and low potassium levels.

To be fair: The black jelly beans weren't to blame as much as the licorice they're flavored with. When doctors became aware of his 50-black-jelly-beans-a-day habit, they cut him off from the treat - and his hypertension disappeared, and potassium levels stabilized. Turns out he'd recently begun snacking on a bag of black jelly beans every day - and continued to do so in the hospital. He'd been having stomach pains for three days, and vomiting and experiencing diarrhea on the previous day before he sought medical help. Don't believe us? Have a look at this curious case study filed in the journal of Postgraduate Medicine where doctors reported that a 51-year old man was hospitalized for both high blood pressure and low potassium levels.
