FDA Warns of Black Licorice OD

Parents raiding their kids' Halloween leftovers beware: The Food and Drug Administration says eating too much black licorice can cause heart problems, especially in people over 40, ABC reports. The treat contains a compound called glycyrrhizin, which, when consumed in large quantities, can cause potassium levels to drop, triggering abnormal heart rhythms and high blood pressure in some people. But only the most hardcore licorice lovers need to worry. The FDA says a person would need to consume 2 ounces of black licorice a day for at least two weeks to experience health problems. (More licorice stories.)