To evaluate the effect of adding licorice to the standard treatment regimen of Helicobacter pylori 

From 2016, this randomized controlled clinical trial, included patients with dyspepsia from peptic ulcer disease or non-ulcer dyspepsia and a positive rapid urease test (which is used to detect H pylori). The group given DGL showed significantly greater therapeutic response (negative H pylori test) compared to the control group (83.8% vs 62.5%, respectively).  

References:

Hajiaghamohammadi AA, Zargar A, Oveisi S, Samimi R, Reisian S. To evaluate of the effect of adding licorice to the standard treatment regimen of Helicobacter pylori. Braz J Infect Dis. 2016 Nov-Dec;20(6):534-538. doi: 10.1016/j.bjid.2016.07.015. Epub 2016 Sep 8. PMID: 27614124; PMCID: PMC9427648.