celiac disease? >> an auto immune disease like having diabetes or multiple scleros sclerosis. >> the doctor is at the forefront of celiac research. he's director of the center for celiac research at mass general hospital for children. there are studies that show one percent of the population or 1 in 133 people in the united states have the disease yet only a small fraction know they have it. >> we don't know what makes people sick. it is undisputed moment is -- (inaudible). >> what is gluten? that's what we hear more than anything. >> it is the most abundant protein in grains like wheat, rye and barley and they are unable to completely digest this