https://www.health.com/condition/heart-disease/black-licorice-bad-for-you



So is black licorice bad for you? When consumed in high amounts, glycyrrhizin, a sweet compound found in licorice root, causes potassium levels to temporarily drop, which in turn may cause abnormal heart rhythms, high blood pressure, swelling, lethargy and, in extreme cases, even heart failure. These issues normally go away once consumption stops.