Submitted to: Cereal Foods World
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 11/14/2005
Publication Date: 2/1/2006
Citation: Kim, H., Behall, K.M., Vinyard, B.T., Conway, J.M. 2006. Short-term satiety and glycemic response after consumption of whole grains varying in the amount of b-glucan. Cereal Foods World. 51:29-33.
Interpretive Summary: Because obesity is related to the amount of food consumed, scientists are investigating the use of dietary fiber as a possible means of reducing food intake and regulating blood glucose. Consumption of whole grain cereals varying in beta-glucan content was tested to determine the role of beta-glucan in the regulation of short-term food intake and glucose response in overweight women and men. Data from this study suggest that at least 2 g of beta-glucan per meal (about 2oz of barley cereal) is required for the reduction of the glucose response in overweight women. There was no effect of beta-glucan intake on food consumed at lunch. Greater than 2 g of beta-glucan per meal may be required to have effects on short-term satiety in both genders. The results of this study will be useful to scientists, the food industry as well as segments of the public that are interested in diabetes, obesity, and dietary fiber intake, especially soluble fiber, beta-glucan.
Technical Abstract: The effects of a meal with and without the soluble fiber, beta-glucan, on short-term satiety and glucose response were investigated in 19 overweight subjects. Subjects consumed four isocaloric test meals consisting of glucose alone or wheat (0 g beta-glucan), wheat-barley mixture (1 g beta-glucan), or barley (2 g beta-glucan) served as cooked cereal with a strawberry yogurt. Visual analog scales (VAS) ratings and blood glucose were periodically measured. Energy intake was measured 2 hour after consumption of the test meals. In women, peak glucose responses and area under the curve were significantly reduced after 2 g of beta-glucan compared with 0 g or 1 g of beta-glucan while VAS ratings did not significantly differ among three cereals. In men, no effect of beta-glucan on glucose response was observed and there were marginal effects of beta-glucan on VAS ratings. Energy intake was not affected by beta-glucan in either gender. These data indicate that acute reduction of the glycemic response in overweight women requires consumption of at least 2 g of beta-glucan per meal. However, greater amounts of beta-glucan per meal may be required to achieve substantial satiety effects in overweight women and men.