Wheat
Even though fiber plays an essential role in our health, high-fiber foods like wheat would be a problem for people with IBS diarrhea. Their body cannot ingest some components and proteins in the food. As a result, the immune system will be triggered to attack your small intestine. This worsens diarrhea and other symptoms. Good alternatives can be the soluble fiber in barley, oatmeal, legumes, as well as many root veggies. [9]
