Research on the gut microbiome has triggered a 'revolution' in nutritional science, and in the last few years, dietary fiber has become the "new protein" – added to foods in abundance to feed our gut and boost our health. A recent study on mice, however, suggests not all fiber supplements are equally beneficial. A form that is readily found in oats and barley, called beta-glucan, can control blood sugar and assist in weight loss among mice fed a high-fat diet. Researchers at the University of Arizona (UA) and the University of Vienna say it is the only type of fiber...