Symptoms of food allergy: slow reactions

SYMPTOMS OF FOOD ALLERGY: SLOW REACTIONS
Most people with food intolerance have symptoms that fluctuate from day to day, and there may be periods when they are worse for a while, or better. Changeable factors, such as stress, probably play a part in these fluctuations, by making the patient more or less susceptible to the foods they are eating.
Following an elimination diet, during which the offending foods are withdrawn for a week or more, the reaction time may speed up considerably. If a culprit food is eaten again after this period of avoidance, the reaction is likely to be both more prompt and more severe. In some people there is an almost immediate reaction, such as vomiting, flushing, itching or a sudden flow of mucus from the nose. (However, sudden severe swelling of the lips and tongue - the characteristic symptom of immediate reactions in food allergy -is not seen.)
More puzzling still, the symptoms that appear on testing are not necessarily the same ones that the patient had before. To orthodox doctors, this is a very dubious aspect of food intolerance, and one that puts the whole phenomenon in doubt - it is a fundamental part of the scientific approach to medicine that the same cause should always produce the same effect. However, the common observation with food-intolerant patients is that the symptoms really do vary in some people, especially after abstinence from the food. How this might be explained is not known at present. But given the fact that food intolerance is probably a result of many interacting factors (see Chapter Twelve) then changing symptoms may not be so implausible as they seem at first sight. If changes occur, following exclusion of the food, it may be because one cause of sensitivity is more easily 'cured' by avoidance than another. Not eating the food could alter the balance of causative factors, and thus produce a different type of symptom.
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