Bacterial overgrowth in the intestine has not been shown to be related to IBS. Some fibers, particularly soluble fibers, act as prebiotics and encourage the growth of friendly bacteria in the colon. You need fiber in your diet for this reason
Although fiber is indigestible this doesn't automatically mean it is fermentable. Some fibers are not fermentable. Many of us have trouble with insoluble fiber.
Some IBS symptoms are unrelated to food consumption and they can be caused simply by the process of eating. Have a look at Gastrocolic reflex
-------------------- STABLE: ♂, IBS-D 50+ years - Science of IBS
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Re: question re FODMAPs and combining this with other diets (and acacia fiber)
