Family Time: Black Licorice In Moderation

November 4, 2013 Updated Nov 4, 2013 at 3:18 PM EDT

By Joanna Pasceri

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November 4, 2013 Updated Nov 4, 2013 at 3:18 PM EDT

A warning for black licorice fans. You may not want to eat too much of the stuff. The Food and Drug Administration says two ounces of black licorice a day for two weeks could affect your heart, especially if you're over age 40 and have a history of heart disease and/or high blood pressure.

Researchers at the FDA say overdoing it on black licorice could lead to a spike in high blood pressure and an irregular heartbeat.

"Black licorice contains a compound that comes from licorice root that can
lower your potassium levels, and lower potassium levels can cause those abnormal
heart arrhythmias," says Kate Patton, registered dietitian at the Cleveland Clinic.

If you do feel funny after eating black licorice and you've had heart trouble in the past, researchers say you should call your doctor.