I actually had SIBO a while back. Several years ago I had a terrible GI doctor who kept saying all my symptoms were in my head. I eventually got to the point where I weighed less than 100lbs and was constantly sick despite being desperate to stomach anything without falling ill. She would just shrug all this off and tell me nothing was wrong. Eventually I switched to a better doctor who immediately diagnosed me with SIBO, and further testing showed that I was genetically incapable of producing fructose transportation enzymes in my small intestine. Of course most things that contain fructose are high in many other sugar alcohols that ferment in the large intestine and cause an over growth in bacteria that thrive in this environment. After my old doctor was discovered to have nearly killed an infant with her refusal to actually do her job, we filed a complaint. Of course MultiCare swept everything under the rug and did nothing...