I have been a professional homoeopath for nearly 20 years and in nearly all my cases of IBS there is a strong link with the symptoms and those of mercury poisoning (from fillings in teeth). Diet and stress may be trigger factors but in my opinion the root cause of IBS is mercury. There is no IBS in the third world and diet and stress there is ten times worse than that in the West.
See a professional homoeopath and you will receive treatment at root cause level.

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Professional homoeopath interested in general discussion, ideas etc.