A number of scientific studies around the world are currently underway, including trials to find out if killing H. Pylori in the oral cavity by chewing mastic gum - not just in the stomach alone - would more permanently eradicate the bug. Unfortunately, as is the case with many therapies and remedies, mastic is not tolerated well by some patients, who reported side effects such as stomach upsets similar to, or even worse than the discomfort experienced from the H. Pylori bacteria itself... Full Text