Food Intolerance.: Chronic diarrhea and gas can be caused by many things. The flex sigmoidoscopy had ruled out colitis and cancer. Other things that can cause these symptoms are food allergies, celiac sprue, overactive thyroid, and lactose intolerance. Your family physician can test you for these. Eat a healthy diet, rich in fiber: vegetables, fruits , legumes and whole grains. Limit high fructose corn syrup.
Answered 3/30/2014
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