Buckwheat (Fagopyrum esculentum, Moench), a herbaceous plant of the Po
lygonaceae family, does not have any affinity for the Gramineae family
. It is commercially rated as a cereal, which has led to some misunder
standing concerning its use in gluten induced enteropathy or celiac di
sease. The effect of buckwheat flour ingestion by celiac patients was
evaluated through the indirect immunofluorescence technique. Samples o
f serum were collected 30 days after the flour ingestion. Cryostat per
formed cuts of wheat and buckwheat grains were accomplished in order t
o compare the reactivity of their proteins and serum of celiac and nor
mal patients. The assay revealed that the buckwheat flour presents no
toxicity for the celiac patient and no anti-protein antibodies formati
on in the grain was observed for serum dilations of 1:2 up to 1:32 wit
h 0.15 M NaCl solution in 0.01 M phosphate buffer, pH 7.2 throughout t
he 30 day assay period. The results of the immunological assays showed
that the buckwheat flour does not present toxic prolamines to celiac
disease patients.