The Effect of Glucose Dose and Fasting Interval on Cognitive Function: a Double-blind, Placebo-controlled, Six-way Crossover Study

Overview

Journal Psychopharmacology (Berl)

Specialty Pharmacology

Date 2011 Oct 8

PMID 21979440

Citations 22

Authors

Lauren Owen

Andrew B Scholey

Yvonne Finnegan

Henglong Hu

Sandra I Sunram-Lea

Affiliations

Soon will be listed here.

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.

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