I had IBS (lots of other issues, too) and my Dr. put me on the FODMAP diet. I didn't find it to be helpful for me. But posted on the FODMAP Facebook and a wonderful Dietician told me that I probably had an issue with "naturally occurring food chemicals". I asked him what food chemicals did he think as I was going to my own doctor. I had posted what I was eating and my issues and he said Salicylates, I hurried and printed out the food list and WOW! What a great change in my life!! So lucky to be pointed to the issue that I had - life was not good before I knew about Sals! Diet helped me to get back to normal. I blame my Cancer on all the issues that I had being Sals Intolerant! So very thankful for finding this wonderful site for all the help! - Karen