Effect of commercial rye whole-meal bread on postprandial blood glucose and gastric emptying in healthy subjects

Joanna Hlebowicz, Jenny Maria Jönsson, Sandra Lindstedt, Ola Björgell, Gassan Darwich, Lars-Olof Almér, Joanna Hlebowicz, Jenny Maria Jönsson, Sandra Lindstedt, Ola Björgell, Gassan Darwich, Lars-Olof Almér

Abstract

Background: The intake of dietary fibre has been shown to reduce the risk of developing diabetes mellitus. The aim of this study was to compare the effects of commercial rye whole-meal bread containing whole kernels and white wheat bread on the rate of gastric emptying and postprandial glucose response in healthy subjects.

Methods: Ten healthy subjects took part in a blinded crossover trial. Blood glucose level and gastric emptying rate (GER) were determined after the ingestion of 150 g white wheat bread or 150 g whole-meal rye bread on two different occasions after fasting overnight. The GER was measured using real-time ultrasonography, and was calculated as the percentage change in antral cross-sectional area 15 and 90 minutes after completing the meal.

Results: No statistically significant difference was found between the GER values or the blood glucose levels following the two meals when evaluated with the Wilcoxon signed rank sum test.

Conclusion: The present study revealed no difference in postprandial blood glucose response or gastric emptying after the ingestion of rye whole-meal bread compared with white wheat bread.

Trial registration: ClinicalTrials.gov NCT00779298.

Figures

Figure 1
Figure 1
The mean change in blood glucose concentration in ten healthy subjects after the ingestion of meals containing rye whole-meal bread (triangle), and white wheat bread (square). No significant differences were found between the various meals according to the Wilcoxon signed rank sum test.
Figure 2
Figure 2
Gastric emptying rate following the ingestion of rye whole-meal bread and white wheat bread, in ten healthy subjects. The median, minimum (Min) and maximum (Max) values, and the values of the first (q1) and the third (q3) quartiles are shown. No significant differences were found between the GERs according to the Wilcoxon signed rank sum test.

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Source: PubMed

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