Just went to the doctor for my 1st Colon Cleanse today. I was told that the toxins that come from the colon can filter into your bloodstream causing FBO. It was defenantly something different! The colon wall is literally packed with fecal matter that sits there forever unless it is cleaned out regularly. It can be kind of pricey, around $65.00 a visit but if it can help cure FBO I will do whatever it takes. I hope this can help some of you out. I hope this works for me! I will keep everyone posted on how much it helps me out!