I had terrible IBS and tried so many diets to try and make it better, but nothing worked. I then was advised to go to an allergy clinic. It cost me £100 but it was worth every penny. I found out that i had food intolerences to all dairy products, all beef products, yeast, potatoes, tomatoes, petters, rapeseed oil and chilli's, I also had too much yeast in my bowel. I was advised to cut all the above out of my die and to drink at least a litre of water a day, also I was told to avoid things like quorn and too much sugar. The first I went shopping I nearly cried it looked like there was nothing I could eat, but gradually over time I have adjusted well. It seems to be a case of cooking everything from scratch and replacing "bad" foods with "good foods" for example replace beef with lamb, custard and cream with soya custard and cream, gravy stock and gravy granuales with onion or vegetable stock, bread with wraps. My life has changed beyond recognition, I am no longer on regular medication and I can now go out without fears of whether there will be toilets there. Yes its tough sometimes and going out for a meal is hard, but most GOOD reastuarants will cater for you. Sometimes I do eat the wrong thing and then all the old symptons come back for a week or so, I then just go back to being good again. I would urge anyone with IBS to get check for food intolerences as you never know.