SPOKANE, Wash.—Eating barely as a part of a whole grain, high-fiber diet may help control and even prevent type 2 diabetes and pre-diabetes, according to the National Barley Foods Council. Barley has a high concentration of dietary fiber, including beta-glucan soluble fiber. Studies have confirmed that beta-glucan soluble fiber is effective in promoting healthy blood sugar, reducing cholesterol, promoting healthy blood pressure and helping control weight, all conditions associated with diabetes.