In 2017, the FDA issued a warning against glycyrrhizin, a sweetening compound that is found in black licorice.
The federal agency claims this ingredient can lower potassium levels, which can lead to heart problems, and warns adults over 40 that "eating 2 ounces of black licorice a day for at least two weeks could land you in the hospital with an irregular heart rhythm or arrhythmia."
David Goldberg reportedly ate a bag of Twizzlers per week, for years.