Fatigue is very often reported as a symptom of food intolerance, especially in connection with migraine and irritable bowel syndrome. Early-morning tiredness is the most frequent problem. Looking back over case-histories, it seems that fatigue may be an early warning sign as food intolerance develops. How food might produce fatigue is not known, but exorphins may play a part, or it may be a side-effect of some generalized immune reaction, as is suspected in post-viral syndrome.

No-one should embark on an elimination diet without first consulting their doctor, but this point should be emphasized for anyone with severe fatigue.

There can be several other causes for this problem, and some of these are serious diseases.

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