Liquorice Root
Also known as: licorice root
Black licorice (glycyrrhizin from licorice root) can raise blood pressure and lower potassium when consumed in significant amounts. FDA has warned consumers, particularly those over 40, that as little as 2 ounces of black licorice a day for two weeks could cause arrhythmias.
What it is
Root of Glycyrrhiza glabra, used as a flavoring and herbal ingredient. Contains glycyrrhizin.
Flavoring in candies, teas, beverages, and tobacco products.
Why it's flagged
- hypokalemia
- hypertension
- cardiac arrhythmia at high intake
What regulators actually say
"If you're 40 or older, eating 2 ounces of black licorice a day for at least two weeks could land you in the hospital with an irregular heart rhythm or arrhythmia."
"Licorice (Glycyrrhiza glabra L.) — GRAS as a natural flavoring substance."
"An upper limit of 100 mg/day glycyrrhizinic acid intake should not be exceeded."
Regulatory status
United States — FDA
Licorice (Glycyrrhiza) listed as GRAS as a flavoring (21 CFR 184.1408); FDA consumer warning on excess intake.
European Union — EFSA
Permitted; SCF/EFSA advise upper safe intake of ~100 mg/day glycyrrhizin.
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