For those who may not know, Celiac disease is a serious autoimmune disorder that virtually destroys the digestive tract and is only reversed by a gluten-free diet.  The main challenge with being diagnosed with Celiac is that it requires an intestinal biopsy.  Needless to say, this is an invasive and not appealing option for those who think they only feel discomfort from gluten-containing grains and do not see the bigger picture. This is one reason people choose to go gluten free - they don't feel right and their doctor suggests trying a gluten-free diet to see if they feel better rather than doing a biopsy.