Psychopharmacology

, Volume 220, Issue 3, pp 577–589

The effect of glucose dose and fasting interval on cognitive function: a double-blind, placebo-controlled, six-way crossover study

  • Lauren Owen
  • Andrew B. Scholey
  • Yvonne Finnegan
  • Henglong Hu
  • Sandra I. Sünram-Lea
Original Investigation

DOI: 10.1007/s00213-011-2510-2

Cite this article as:
Owen, L., Scholey, A.B., Finnegan, Y. et al. Psychopharmacology (2012) 220: 577. doi:10.1007/s00213-011-2510-2

Abstract

Rationale

Previous research has identified a number of factors that appear to moderate the behavioural response to glucose administration. These include physiological state, dose, types of cognitive tasks used and level of cognitive demand. Another potential moderating factor is the length of the fasting interval prior to a glucose load.

Objectives

Therefore, we aimed to examine the effect of glucose dose and fasting interval on mood and cognitive function.

Methods

The current study utilised a double-blind, placebo-controlled, balanced, six period crossover design to examine potential interactions between length of fasting interval (2 versus 12 hours) and optimal dose for cognition enhancement.

Results

Results demonstrated that the higher dose (60 g) increased working memory performance following an overnight fast, whereas the lower dose (25 g) enhanced working memory performance following a 2-h fast.

Conclusions

The data suggest that optimal glucose dosage may differ under different conditions of depleted blood glucose resources. In addition, glucoregulation was observed to be a moderating factor. However, further research is needed to develop a model of the moderating and mediating factors under which glucose facilitation is best achieved.

Keywords

Cognition Cognitive Glucose Metabolism 

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Lauren Owen
    • 1
    • 4
  • Andrew B. Scholey
    • 1
  • Yvonne Finnegan
    • 2
  • Henglong Hu
    • 2
  • Sandra I. Sünram-Lea
    • 3
  1. 1.Centre for Human PsychopharmacologySwinburne University of TechnologyHawthorneAustralia
  2. 2.Nutrition Sciences, GSK Nutritional Healthcare R&DGlaxoSmithKlineLondonUK
  3. 3.Centre for Research in Human Development and Learning, Department of PsychologyLancaster UniversityLancasterUK
  4. 4.Centre for Human PsychopharmacologySwinburne UniversityMelbourneAustralia

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