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In an article reviewing the status of gastrointestinal allergy in the New England Journal of Medicine in 1949, Ingelfinger et al 1 decried the reliance on patients’‘‘incrimination’’of specific foods, outcome of trial diets, or association of abdominal complaints with symptoms believed to be allergic in making the diagnosis of food allergy. These authors did not doubt that food allergy existed but believed that the criteria used to diagnose food allergy were unacceptable. They proposed the following criteria:(1) food should be given in capsules, by stomach tube, or in such a manner that the patient is unaware of its nature;(2) reproducible symptoms should consistently follow administration of the disguised food at a more or less constant interval;(3) other foods given to the patient in the same manner should not produce similar changes; and (4) suspected foods given in the same manner to nonallergic healthy subjects should …