The effect of blueberry interventions on cognitive performance and mood: A systematic review of randomized controlled trials.

Authors:
Nikolaj Travica
Nikolaj Travica
National Institute of Integrative Medicine Melbourne
Nenad Naumovski
Nenad Naumovski
University of Canberra
Australia
Katherine Kent
Katherine Kent
School of Medicine
Duane D Mellor
Duane D Mellor
University of Canberra
United Kingdom
Joseph Firth
Joseph Firth
Institute of Brain
Ekavi N Georgousopoulou
Ekavi N Georgousopoulou
School of Health Science and Education
Greece
Olivia M Dean
Olivia M Dean
School of Medicine
Irvine | United States

Brain Behav Immun 2019 Apr 15. Epub 2019 Apr 15.

IMPACT Strategic Research Centre, School of Medicine, Barwon Health, Deakin University, Geelong, Victoria 3216, Australia. Electronic address:

Blueberries are rich in polyphenols that may be beneficial to cognitive performance and mood. The aim of this systematic review was to evaluate randomized controlled trials investigating the effects of blueberries and blueberry products on measures of cognition and mood. In total, eleven articles (that included 12 studies) were identified using freeze-dried blueberries (n = 9 studies), whole blueberries (n = 2) and blueberry concentrate (n = 1). These studies were conducted in children (n = 5), young adults (n = 1), and older people with either no known cognitive impairment (n = 4) or indicated cognitive impairment (n = 2). Eight studies reported blueberry consumption or supplementation at various doses and time lengths to improve measures of cognitive performance, particularly short- and long-term memory and spatial memory. For mood, one study reported significant between-group improvements in positive affect from blueberry products, whereas four studies reported no improvement. Low risk of bias were observed across all studies. Based on the current evidence, blueberries may improve some measures of cognitive performance. However, considerable differences in study design, dosages, and anthocyanin content hinder between-study comparison. The use of standardized blueberry interventions, consideration of placebo formulations, and consistently reported cognitive performance tools are recommended in future trials. PROSPERO registration no. CRD42018100888.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.bbi.2019.04.001DOI Listing
April 2019
1 Read

Publication Analysis

Top Keywords

cognitive performance
20
improve measures
8
cognitive impairment
8
systematic review
8
controlled trials
8
randomized controlled
8
performance mood
8
studies reported
8
measures cognitive
8
blueberry interventions
8
blueberry products
8
cognitive
7
studies
6
blueberry
6
blueberries
5
performance
5
reported blueberry
4
blueberry consumption
4
comparison standardized
4
doses time
4

Altmetric Statistics

Similar Publications