Everyone, people are learning about the role of vitamin D in eliminating IBS. Turns out that most cases of IBS arise from a vitamin D deficiency, and it turns out that most people are vitamin D deficient, despite taking multivitamins. I've been getting more vitamin D since October 2009 and my symptoms gradually subsided. It's miraculous. I usually don't post in forums but my conscience wouldn't be able to handle keeping this info to myself. Anyway, here are some materials for you to check out for yourself:http://www.youtube.com/watch?v=Cq1t9WqOD-0...feature=channelAnd for more information about vitamin D, check out the video lecturer's book, The Vitamin D Solution, by Dr Michael Holick. The book will tell you all about how much to take, reliable brands, etc. Personally, I've found the Costco brand works fine. Costco sells a bottle of 600 capsules of 2000 UI each for $14, which is a steal. Following Dr Michael's advice, I started with 50,000 UI per day, then gradually lowered it. Give yourself a month to notice improvements.Check it out for yourself. I'm sure your all skeptical since you feel you've tried everything, and that's why I provide the links.Good luck!