1. Gliadin from which carbohydrate was removed by treatment with carbohydrase from Aspergillus niger was fed to three coeliac patients in remission.
2. Xylose absorption, mucosal morphology and brush-border enzymes were used to assess the toxicity of the carbohydrase-treated gliadin.
3. Gliadin treated with carbohydrases did not damage the intestinal mucosa of the coeliac patients.
4. The primary structure of the gliadin proteins was not altered by the enzyme treatment.