The U.S. Food and Drug Administration (FDA) want people to know about the dangers of consuming too much black licorice.

While the candy isn’t exactly the tastiest option for Halloween (which is today), there are some ravenous fans of black licorice out there. The agency warned about the dangers of the candy on its website.

The reason behind the warning is the fact that too much munching on black licorice can cause a slate of health conditions, including irregular heart rhythm. This is especially true among consumers over 40.

The candy has a sweetening compound called glycyrrhizin, which is capable of causing a drop in potassium levels. When potassium drops in a person’s body, there’s a chance of increased blood pressure, swelling and congestive heart failure.

However, don’t fret too much if you consume copious amounts of black licorice as ceasing to eat the candy should restore your potassium levels fairly quickly, bringing you back to homeostasis.

If you already have irregular heart rhythm or muscle weakness, immediately stop eating black licorice and call your doctor, especially if symptoms begin appearing in your body such as lethargy, edema and congestive heart failure.

However, health professionals claim that you can’t actually overdose on black licorice to the extent where it kills you in a brief window of time.

The U.S. is spending about $2.7 billion in Halloween candy this year.