title: The effect of glucose dose and fasting interval on cognitive function: a double-blind, placebo-controlled, six-way crossover study.
abstract: BACKGROUND
  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.
  
  
  OBJECTIVE
  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.
authors: Centre for Human Psychopharmacology, Swinburne University of Technology, Hawthorne, 3122, VIC, Australia. Lauren.J.owen@gmail.com
authors: Lauren
authors: L
authors: Owen
authors: Andrew B
authors: AB
authors: Scholey
authors: Yvonne
authors: Y
authors: Finnegan
authors: Henglong
authors: H
authors: Hu
authors: Sandra I
authors: SI
authors: Sünram-Lea
mesh_terms: D000293:Adolescent; D000328:Adult; D001786:Blood Glucose; D003071:Cognition / Q000187:drug effects*; D018592:Cross-Over Studies; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005215:Fasting; D005947:Glucose / Q000008:administration & dosage / Q000494:pharmacology*; D006801:Humans; D008570:Memory, Short-Term / Q000187:drug effects*; D013997:Time Factors; D055815:Young Adult
chemical_list: D001786:Blood Glucose; D005947:Glucose