I may have linked to this video before. If I have I apologize. It would have been at least a couple years ago. It is a presentation by Dr Paul Mason. He just completely amazes me the depths he goes into basic research and the number of technical papers he must read. I wonder how many people suffer because of things they simply aren't aware of. Probably affects only a small percentage of people to a significant degree. But if you happen to be one of those.............. https://m.youtube.com/watch?v=mjQZCCiV6iA

Edit: just watched this again. It is an excellent presentation.
IBS patients listen starting at minute 37