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See,  http://www.celiac.com/history.html#Intolerant

Why So Many Intolerant To Gluten ?

"We have recently reported on Lancet (1) a consistent cohort of patients
affected by drug-resistant epilepsy with cerebral calcifications, half of
which were cured by a gluten-free diet. All had an atrophic jejunal mucosa,
which recovered on a gluten free diet. Gluten intolerance is now a recognized
cause of brain calcifications and epilepsy, of dementia, of psychiatric
disturbances: many researchers believe that, in genetically predisposed
subjects, gluten is not healthy for the brain function (2)."