i recommend you see a registered dietitian who specializes in gastrointestinal disorders. he or she can help you figure out which foods may be exasperating your symptoms and how to maintain weight while getting adequate nutrition. you can find a dietitian in your area at eatright. org. for more on diet with ibs see this webmd article. good luck!
weight loss due to loss of taste and diarrhea. i have lossed 24 pounds last six months. no taste and diarrhea often. i have ibs and have had colonoscopy and cat scan. negative results. also have diverticulosis. i am 70 years old