The link between food allergy and migraine has long been dismissed by many general practitioners, who do not tend to treat their patients' migraine headaches as having food-allergy-based etiologies. However, various foods have been cited as causative agents including citrus fruits, tea, coffee, pork, chocolate, milk, nuts, vegetables, and cola drinks.28,29 In general, higher IgE incidence is no greater among people with migraine headaches than among the general population. However, this does not rule out food allergy as a cause of migraine headaches. There are various causes of migraines that are more appropriately labeled as food sensitivities to tyramine, phenylalanine, phenolic flavonoids, alcohol, and caffeine. In addition, food additives, such as sodium nitrate, monosodium glutamate, and aspartame, are thought to induce migraine headaches by modifying vascular tone. Each patient must be individually assessed for various causes and relationships to foods prior to establishing an allergic causation of the headaches.
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