January 7, 2015
Higher dietary fiber intake is linked to reduced body weight
At a Glance
Studies show that in addition to its established role in supporting overall health, higher dietary fiber consumption may play a significant role in weight loss and obesity.
Read more about this research below.
One particular cohort study, published in the American Journal of Clinical Nutrition, included 89,432 European participants, aged 20–78 years, who were initially free of cancer, cardiovascular disease, and diabetes. Participants were followed for an average of 6.5 years. Results indicated that total dietary fiber intake was inversely associated with weight and change in waist circumference during the study period. At 10 grams/day higher total fiber intake, there was an estimated 39 grams/year weight loss and waist circumference decreased by 0.08 cm/year. A 10 grams/day fiber intake from cereals alone results in 77 grams/year weight reduction and 0.10 cm/year reduction in waist circumference. Fruit and vegetable fiber was not associated with weight change but had an effect similar to total and cereal fiber intake on reduced waist circumference.
In another study, a review article published in the journal Nutrition suggests that dietary fiber helps prevent obesity in several different ways. It promotes satiation by slowing gastric emptying, altering glycemic or insulin response, decreasing absorption of macronutrients, and by altering the secretion of gut hormones linked to hunger.
Over the last decade many the most popular weight-loss diets have trended towards high-protein and low-carbohydrate intakes to lose weight. Unfortunately, in an effort to lower carbohydrate intake, these diets often have very low fiber intake as well. Analysis of low carbohydrate diets reveal that in some cases dietary fiber intake is as low as 1.6 grams/day and is almost always less than 10 grams/day.
The author of this review suggests that regardless of dieting method that individuals choose to follow, they should consider the addition of fiber to aid their weight-loss. Dietary fiber can be increased through increasing consumption fruits, vegetables, whole grains, legumes, or through a fiber supplement.
Huaidong Du et al. Dietary fiber and subsequent changes in body weight and waist circumference in European men and womenAm J Clin Nutr Vol. 91, No. 2, 329-336, February 2010.
Slavin J. Dietary fiber and body weight. Nutrition 21(2005);411-418.