NEWARK, Del. — Many foods can exacerbate symptoms of irritable bowel syndrome, but several randomized clinical trials show benefit of a low FODMAP (Fermentable Oligosaccharides, Disaccharides, Monosaccharides and Polyols) diet, Asyia Ahmad, MD, MPH, chief of gastroenterology at Drexel University College of Medicine, said at the second annual GI Symposium.