 Growing evidence indicates "L. reuteri" is capable of fighting the gut pathogen "Helicobacter pylori", which causes peptic ulcers and is endemic in parts of the developing world.One study showed dietary supplementation of "L. reuteri" alone reduces, but does not eradicate, "H. pylori" in the gut.Another study found the addition of "L. reuteri" to omeprazole therapy dramatically increased (from 0% to 60%) the cure rate of "H. pylori"-infected patients compared to the drug alone.