Original Research

The effects of soluble corn fibre and isomaltooligosacharides on blood glucose, insulin, digestion and fermentation in healthy young males and females

Ryan P. Lowery, Jacob M. Wilson, Andrew Barninger, Matthew H. Sharp, Christopher Irvin, Matthew Stefan, William A. Wallace, Gabriel J. Wilson, Michael D. Roberts, Ronald Wagner
Journal of Insulin Resistance | Vol 3, No 1 | a32 | DOI: https://doi.org/10.4102/jir.v3i1.32 | © 2018 Ryan P. Lowery, Jacob M. Wilson, Andrew Barninger, Matthew H. Sharp, Christopher Irvin, Matthew Stefan, William A. Wallace, Gabriel J. Wilson, Michael D. Roberts, Ronald Wagner | This work is licensed under CC Attribution 4.0
Submitted: 07 November 2017 | Published: 26 February 2018

About the author(s)

Ryan P. Lowery, Department of Health and Human Performance, Concordia University Chicago and Applied Science and Performance Institute, United States
Jacob M. Wilson, Applied Science and Performance Institute, United States
Andrew Barninger, Applied Science and Performance Institute, United States
Matthew H. Sharp, Applied Science and Performance Institute, United States
Christopher Irvin, Applied Science and Performance Institute, United States
Matthew Stefan, Applied Science and Performance Institute, United States
William A. Wallace, Applied Science and Performance Institute, United States
Gabriel J. Wilson, Maximum Human Performance, United States
Michael D. Roberts, Molecular and Applied Sciences Lab, School of Kinesiology, Auburn University, United States
Ronald Wagner, Department of Health and Human Performance, Concordia University Chicago, United States


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Abstract

Dietary fibre refers to nutrients in the diet that gastrointestinal enzymes do not digest. If properly labelled, dietary fibres should not significantly elevate blood glucose or insulin and should ferment in the large intestine. Because of the recent rise in low-carbohydrate products on the market, consumers use these various fibres without adequate knowledge concerning whether or not these ingredients affect any blood parameters and constitute a dietary fibre. The aim of this study was to examine the impact of isomaltooligosaccharides (IMO) as compared to soluble corn fibre (SCF) consumption on blood glucose, insulin and breath hydrogen responses in healthy young men and women. After an overnight fast, nine individuals consumed 25 g of either placebo (PLA), IMO or SCF. Breath hydrogen was significantly higher in the SCF condition than in the IMO and PLA at 90, 120, 150 and 180 min (p < 0.0001). Blood glucose and insulin were higher in the IMO condition (p < 0.0001) at 30 min compared to the SCF or PLA conditions, which were not significantly different from each other. These data suggest that IMO does not constitute a dietary fibre and instead should be explored as a slow-digesting carbohydrate.


Keywords

obesity; fiber; insulin resistance; blood glucose

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