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One thousand individuals were asked whether they avoided any foods. Of the 560 replies 33% stated that they avoided one or more foods because they caused 'unpleasant physiological reactions'. 2. Adverse reactions to one of thirteen foods were reported by 1-4% of the respondents and it is suggested that this number might be regarded as a standard with which to compare reactions to novel foodstuffs. A total of sixty-seven foods were specifically mentioned as a cause of an adverse reaction.
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Bender et al. (1981) studied this question.
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