Gluten intolerance
Some people react badly to gluten, a protein found in wheat, barley, and rye. The most severe form of gluten intolerance is called celiac disease. “The gluten causes damage in the small intestine,” explains Dr. Alaradi. “The small intestine doesn’t work normally, it doesn’t absorb nutrients.” Experts and patients are becoming more aware of gluten intolerance and celiac disease, which causes gas, bloating, mild-to-severe pain, and fatigue.