. . "Gluten is in all kinds of things you would not expect it to be in (soy sauce? really?), and if you really have a problem with it, even pretty minor contamination can cause a flare-up.posted by adamrice at 12:00 PM on July 16, 2012 Dairy was a huge trigger for me, especially for gut pain, though that didn't come up when I was initially given the IBS diagnosis." . .