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Perceived food palatability, blood glucose level and future discounting: Lack of evidence for blood glucose level’s impact on reward discounting

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  • Rafał Muda
  • Przemysław Sawicki
  • Michał Ginszt

Abstract

Some previous studies have shown that an increase in blood glucose level makes people more future oriented, however, results are inconsistent, other studies failing to replicate this effect. Here, we tested whether psychological factors (in this instance, perception of food pleasantness after consumption of more palatable or less palatable meal) can play a moderating role. We hypothesized that consuming more palatable food (perceived as rewarding) should cause blood glucose levels to affect future discounting, but that this should not occur for the consumption of less palatable food. A high-powered, independent groups experiment (N = 149, power β = .90) showed that, subsequent to performing an initial discounting task, the two groups consuming a meal (a control group consumed no meal) displayed a significant increase in blood glucose levels 10 minutes after meal consumption and just before repeating the discounting task. However, the increased blood glucose levels did not cause changes in delay discounting in either experimental group.

Suggested Citation

  • Rafał Muda & Przemysław Sawicki & Michał Ginszt, 2021. "Perceived food palatability, blood glucose level and future discounting: Lack of evidence for blood glucose level’s impact on reward discounting," PLOS ONE, Public Library of Science, vol. 16(8), pages 1-10, August.
    • Handle: RePEc:plo:pone00:0255484
    DOI: 10.1371/journal.pone.0255484
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    References listed on IDEAS

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    1. Michael A. Kuhn & Peter Kuhn & Marie Claire Villeval, 2014. "Self Control and Intertemporal Choice: Evidence from Glucose and Depletion Interventions," Post-Print halshs-00954539, HAL.
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