Our whole survival and camping food strategy had to change when my wife was diagnosed with Celiac disease a year ago. Aside from the obvious wheat, barley, and rye, in all their forms and derivatives, many with this auto-immune disorder, including my wife, are also unable to tolerate oats. The sensitivity extends even to foods processed on the same equipment as the above grains. An example is one time while traveling my wife ate some Pringles without reading the ingredients. We spent that evening in the ER...... We had to purge the house and camper of all food, including our stored emergency food, and most of our cooking gear and rethink everything. It took us quite a while to rebuild our supplies and equipment.