Too much black licorice candy cost man his life: NEJM case report

"Even a small amount of licorice you eat can increase your blood pressure a little bit," said Dr. Neel Butala, a cardiologist at Massachusetts General Hospital who described the case in the New England Journal of Medicine.

LICORICE extract from the root of Glycyrrhiza glabra is one of the sweetest substances known and has long been used in Chinese medicines.

The glycyrrhizic acid found in black licorice and in many other foods and dietary supplements containing licorice root extract can cause dangerously low potassium and electrolyte imbalance.

Eating as little as 2 ounces of black licorice a day for two weeks could cause a heart rhythm problem, especially for people over age of 40, the U.S. Food and Drug Administration warns.

The FDA permits up to 3.1% of a food's content to have glycyrrhizic acid, but many candies and other licorice products don't reveal how much of it is contained per ounce, Butala said. Doctors have reported the case to the FDA in hope of raising attention to the risk.

'It's more than licorice sticks. It could be jelly beans, licorice teas, a lot of things over the counter. Even some beers, like Belgian beers, have this compound in it," as do some chewing tobaccos, said Dr. Robert Eckel, a University of Colorado cardiologist and former American Heart Association president.He had no role in the Massachusetts man's care.