Introduction

This fact sheet provides basic information about licorice root--common names, uses, potential side effects, and resources for more information. Most licorice is grown in Greece, Turkey, and Asia. Licorice contains a compound called glycyrrhizin (or glycyrrhizic acid).

Common Names--licorice root, licorice, liquorice, sweet root, gan zao (Chinese licorice)

Latin Name--Glycyrrhiza glabra, Glycyrrhiza uralensis (Chinese licorice)

What It Is Used For

Licorice root has been used as a dietary supplement for stomach ulcers, bronchitis, and sore throat, as well as infections caused by viruses, such as hepatitis.

How It Is Used

• Peeled licorice root is available in dried and powdered forms.
• Licorice root is available as capsules, tablets, and liquid extracts.
• Licorice can be found with glycyrrhizin removed; the product is called DGL (for "deglycyrrhizinated licorice").

What the Science Says

• A review of several clinical trials found that glycyrrhizin might reduce complications from hepatitis C in some patients. However, there is not enough evidence to confirm that glycyrrhizin has this effect.
• There are not enough reliable data to determine whether licorice is effective for stomach ulcers.