Researchers studied a Korean edible mushroom called Amanita hemibapha subsp. javanica and found it contains compounds that can kill the bacteria Helicobacter pylori, which causes stomach ulcers and gastric cancer. One compound in particular showed strong antibacterial activity, performing even better than some known antibiotics. These findings suggest this mushroom could be a natural source for developing new medicines to treat H. pylori infections and fight antibiotic-resistant strains.