Don’t count on the fiber added to processed foods to suppress hunger, suggests new research from the University of Minnesota. Fiber naturally found in plant foods helps make you feel full longer so you eat less—and is thus promoted for weight control.
But “functional” or “isolated” fibers added to foods may not have all the physiological effects of natural intact fibers, as was suggested by the study, in the Journal of the American Academy of Nutrition and Dietetics in September.
It found that chocolate snack bars with added fibers (inulin, oligofructose, soluble corn fiber or resistant wheat starch) did not alter hunger or fullness levels or reduce food intake over the course of a day, compared to a no-fiber-added bar.
Still, fiber-fortified foods can be a worthwhile source of additional fiber, the researchers concluded.