There are also Mormons who don't have wheat in their food storage.
For a rising number of members of The Church of Jesus Christ of Latter-day Saints, celiac disease can define food-related church experiences more so than the stereotypical Jell-O.
Celiac disease is a digestive disease that damages the small intestine and doesn't allow absorption of nutrients into the body. Those with this disease are not able to ingest gluten, which is a protein in wheat, barley and rye.
When someone with celiac disease eats something containing gluten, their immune system responds by destroying villi — tiny finger-like protrusions lining the small intestine. Without villi, a person becomes malnourished, no matter how much they eat.