FODMAP diet to the letter. No cheating. Problem solved in 2 weeks. 10 years clear sticking with it, including holidays and special celebrations. No cheating even a little bit or return to missing a day of celebrating. Take these words from a decade adhering to a Gastroenterologist recommendation in lieu of exploratory surgery and painful biopsies. I took the diet option instead of surgery to find out what caused severe IBS on me. HOWEVER, my primary type was acute chronic IBS-D. FODMAP is an acronym for a chain of sugars.