Black licorice eaters who are 40 years of age or older should eat a maximum of two ounces (about three 1-inch pieces) a day — or risk hospitalization from an irregular heart rhythm or arrhythmia.

On the eve of Halloween, the Food and Drug Administration has struck terror in the hearts of black licorice eaters of a certain age.

About Robert Zinn

Robert Zinn, M.D., Ph.D. is a medical doctor, physician, and web entrepreneur, who, for over 15 years was employed by academic and research institutions and focused his clinical practices on very specialized patient populations, such as those with rare genetic diseases or rare cancers. He shares his knowledge through his website,

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