Broccoli and broccoli sprouts contain a chemical called sulforaphane that kills helicobacter pylori, the bacteria responsible for peptic ulcers and most gastric cancers, according to researchers at the Johns Hopkins University School of Medicine. In the U.S., approximately 50% of people over age 50 test positive for H. pylori, which does not always cause ulcers, but is now known to dramatically increase an individual's risk for often fatal stomach cancers, and to be a causative factor in a wide range of other stomach disorders including gastritis, esophagitis, and acid indigestion. In the lab, scientists at Johns Hopkins found that sulforaphane...