I have been suffering with IBS-D for about 11 years, since my first pregnancy. My oldest daughter, through blood test, has been found to have a wheat allergy. She has been on a wheat free diet for a couple of months now and is improving (her biggest symptoms were sinus/asthma problems). Closely related to wheat allergy is another food allergy called gluten intolerance / celiac disease. It's been very educating because on the other website message board I've been corresponding on (www.celiac.com), a lot of the symptoms sound like IBS-D. In fact, a lot of the people who have celiac were suffering for many years with what they thought was IBS. Their doctors just dismissed them. Perhaps there are people reading this message board who have celiac disease who don't even know it! Celiac disease is detected through a blood test and biopsy. I do not claim to be an expert on either celiac or IBS but it's just been amazing to me that the two diseases/syndromes are similar. Maybe there's somebody else out there who has more input on this. Anyway, I've decided to make an appointment with the GI to have the blood test for celiac and we'll see what happens. Wish me luck.