Peptic ulcers are painful sores that develop in your stomach, lower esophagus, or small intestine. They’re commonly caused by inflammation resulting from H. pylori bacteria .

Licorice root extract and its glycyrrhizin may help treat peptic ulcers.

One study in mice found that licorice extract doses of 91 mg per pound (200 mg per kg) of body weight protected against these ulcers better than omeprazole, a common peptic ulcer medication .

While more research is needed in humans, a 2-week study in 120 adults showed that consuming licorice extract in addition to a standard treatment significantly reduced the presence of H. pylori .