Be Cautious With Black Licorice

October 26th, 2011

Black licorice—either you love it or hate it. If you love it, you need to be aware that too much of a good thing can be seriously dangerous to your health.

Black licorice contains a compound called glycyrrhizin, which can cause potassium levels in the body to fall. What this means is that adults who eat as little as 2 ounces of licorice a day for two weeks or longer could end up in the hospital  with an irregular heart rhythm. (Two ounces is less than 6 sticks of licorice.)

This danger is especially true for people who are over age 40 who have a history of heart disease and/or high blood pressure. The arrhythmia is temporary, and heart rhythms and potassium levels return to normal after stopping eating licorice.

If you have a fondness for black licorice, FDA offers this advice:

  • No matter what your age, don’t eat large amounts of black licorice at one time.
  • If you have been eating a lot of black licorice and have an irregular heart rhythm or muscle weakness, stop eating it immediately and contact your healthcare provider.
  • Black licorice can interact with some medications, herbs and dietary supplements. Consult a health care professional if you have questions about possible interactions with a drug or supplement you take.

To read the full announcement from the FDA, click here:  Trick or Treat?