Traditionally, a gluten-free diet was reserved for sufferers of celiac disease; a genetic autoimmune disorder in which abnormal antibodies are triggered by the presence of gluten. These antibodies attack and damage the walls of the small intestine. Celiac disease can be diagnosed through testing, although about 80-90% of cases go undiagnosed. Now evidence exists for a new kind of intolerance for gluten called gluten insensitivity.

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