A drink many people reach for every day was tied to a surprisingly large increase in stomach cancer risk. Researchers also uncovered another clue that may help explain why this habit deserves a closer look.

For most, the common bacteria H. pylori has no symptoms. But for some it leads to all sorts of gastric problems, like heartburn, indigestion, gastritis and gastric cancer. Now, research has found a troubling factor that can ramp that cancer risk way up…