Anxious dieters consuming excessive amounts of fiber in an effort to lose weight may find that they lose more nutrients than pounds, according to a university study.
Overweight adults who consumed a very high-fiber oat and wheat bran bar daily lost only one pound more than those on low-fiber diets in a 12-week, clinical study at UC Davis' Clinical Nutrition Center which specializes in weight loss.
"We expected to find that fiber in large amounts, with its ability to move food through the system, would promote weight loss," said Carolyn S. Russ, a registered dietitian and principal researcher of the Davis study. "But the 40-gram supplements we used, which were much like those high-fiber bars found in crash or fad diets, were ineffective."
One Could Lose Vital Nutrients
In addition to being useless for weight loss, extremely high-fiber diets can bind minerals such as calcium, zinc and copper and remove them from the bowel, according to the Harvard Medical School Health Letter.