 Dr. Daniel Leffler from Beth Israel Deaconess Medical Center in Boston is an expert on the conditions and he says cutting down on gluten can cause other nutritional concerns. Wheat in particular in the American diet is one of the major sources of B vitamins. They're fortified with folate but also naturally occurring B vitamins. It's also one of the major sources of fiber and most Americans don't eat enough fiber and we know this is bad for colon health, this is bad for cholesterol to not eat enough fiber.