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Open AccessArticle

Effect of Consuming Oat Bran Mixed in Water before a Meal on Glycemic Responses in Healthy Humans—A Pilot Study

1
DSM Nutritional Products Ltd., R & D Human Nutrition and Health, Basel 4057, Switzerland
2
Glycemic Index Laboratories, Inc., Toronto, ON M5C 2N8, Canada
*
Author to whom correspondence should be addressed.
Nutrients 2016, 8(9), 524; https://doi.org/10.3390/nu8090524
Received: 23 June 2016 / Revised: 3 August 2016 / Accepted: 19 August 2016 / Published: 26 August 2016
(This article belongs to the Special Issue Dietary Fibers and Human Health)
Background: Viscous dietary fibers including oat β-glucan are one of the most effective classes of functional food ingredients for reducing postprandial blood glucose. The mechanism of action is thought to be via an increase in viscosity of the stomach contents that delays gastric emptying and reduces mixing of food with digestive enzymes, which, in turn, retards glucose absorption. Previous studies suggest that taking viscous fibers separate from a meal may not be effective in reducing postprandial glycemia. Methods: We aimed to re-assess the effect of consuming a preload of a commercially available oat-bran (4.5, 13.6 or 27.3 g) containing 22% of high molecular weight oat β-glucan (O22 (OatWell®22)) mixed in water before a test-meal of white bread on glycemic responses in 10 healthy humans. Results: We found a significant effect of dose on blood glucose area under the curve (AUC) (p = 0.006) with AUC after 27.3 g of O22 being significantly lower than white bread only. Linear regression analysis showed that each gram of oat β-glucan reduced glucose AUC by 4.35% ± 1.20% (r = 0.507, p = 0.0008, n = 40) and peak rise by 6.57% ± 1.49% (r = 0.582, p < 0.0001). Conclusion: These data suggest the use of oat bran as nutritional preload strategy in the management of postprandial glycemia. View Full-Text
Keywords: postprandial glycemia; dietary fibre; blood glucose; type 2 diabetes mellitus; preload postprandial glycemia; dietary fibre; blood glucose; type 2 diabetes mellitus; preload
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MDPI and ACS Style

Steinert, R.E.; Raederstorff, D.; Wolever, T.M.S. Effect of Consuming Oat Bran Mixed in Water before a Meal on Glycemic Responses in Healthy Humans—A Pilot Study. Nutrients 2016, 8, 524.

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