Abstract
Purpose
Variations in specific oral processing behaviours may contribute to differences in glucose, insulin and satiety responses to a standardised test meal. This study tested how natural variations in oral processing between slower and faster eaters contribute to differences in post-prandial glucose (PP glucose), insulin response (PP insulin) and post-meal satiety for a standardised test meal.
Methods
Thirty-three participants with higher risk for type 2 diabetes consumed a standardised test-meal while being video recorded to derive specific oral processing behaviours. Plasma glucose, insulin and satiety measures were collected at baseline, during and post meal. Participants were split into slower and faster eaters using median split based on their eating rates and individual bolus properties were analysed at the point of swallow.
Results
There were large variations in eating rate (p < 0.001). While there was no significant difference in PP glucose response (p > 0.05), slower eaters showed significantly higher PP insulin between 45 and 60 min (p < 0.001). Slower eaters had longer oro-sensory exposure and increased bolus saliva uptake which was associated with higher PP glucose iAUC. Faster eating rate and larger bolus particle size at swallow correlated with lower PP glucose iAUC. A slower eating rate with greater chews per bite significantly increased insulin iAUC. Faster eaters also consistently rated their hunger and desire to eat higher than slower eaters (p < 0.05).
Conclusions
Natural variations in eating rate and the associated oral processing contributed to differences in PP glucose, PP insulin and satiety responses. Encouraging increased chewing and longer oral-exposure time during consumption, may promote early glucose absorption and greater insulin and satiety responses, and help support euglycaemia.
Trial Registration
ClinicalTrials.gov identifier: NCT04522063.
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Data availability
The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
Code availability
Software application are available from the corresponding author on reasonable request.
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Funding
The study was supported by the Singapore Ministry of Health’s National Medical Research Council under its Centre Grant Programme (NMRC/CG/M009/2017_NUH/NUHS). GAT, CJYM, PS and FCG were supported by the Singapore Biomedical Research Council Food Structure Engineering for Nutrition and Health (Sub-grant Grant no. H18/01/a0/E11, Awarded to PI: Forde, C. G.).
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KCM, WC, VDRM and FCG Study design. GAT, CJYM and CXH Data collection. GAT, CJYM, PS, FCG Data analysis. GAT, CJYM, FCG Writing. CXH, PS, KCM, WC, VDRM, FCG Review and edit. FCG Overall responsibility for the final manuscript.
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Goh, A.T., Choy, J.Y.M., Chua, X.H. et al. Increased oral processing and a slower eating rate increase glycaemic, insulin and satiety responses to a mixed meal tolerance test. Eur J Nutr 60, 2719–2733 (2021). https://doi.org/10.1007/s00394-020-02466-z
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DOI: https://doi.org/10.1007/s00394-020-02466-z