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Fruits, vegetables, 100% juices, and cognitive function.

Daniel J Lamport1, Caroline Saunders, Laurie T Butler

  • 1School of Psychology and Clinical Language Sciences, University of Reading, Reading, UK.

Nutrition Reviews
|November 18, 2014
PubMed
Summary
This summary is machine-generated.

Consuming fruits, vegetables, and juices regularly benefits cognitive function in older adults. Acute fruit juice intake may improve memory in those with mild cognitive impairment.

Keywords:
cognitioncognitive functionfruitjuicevegetable

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Area of Science:

  • Nutrition Science
  • Neuroscience
  • Public Health

Background:

  • Existing research often focuses on polyphenols, not whole foods.
  • Cognitive effects of fruit, vegetable, and juice intake require comprehensive review.
  • Previous reviews have not synthesized epidemiological and intervention data.

Purpose of the Study:

  • To review epidemiological and intervention studies on fruit, vegetable, and juice consumption and cognitive function.
  • To assess the impact of these food groups on cognition across different study types.
  • To identify benefits and limitations in current research.

Main Methods:

  • Systematic review of human studies.
  • Inclusion criteria: fruit/vegetable/juice consumption, objective cognitive measures, neuropsychological disease diagnosis.
  • Exclusion criteria: non-isolated food group assessment, lack of statistical control for education/IQ.

Main Results:

  • 17/19 epidemiological studies showed benefits of fruit, vegetable, or juice consumption for cognitive performance.
  • 3/6 intervention studies reported significant cognitive benefits.
  • Chronic consumption appears beneficial for healthy older adults' cognition.
  • Acute juice intake showed memory benefits in mild cognitive impairment, but not in healthy adults.

Conclusions:

  • Chronic intake of fruits, vegetables, and juices supports cognitive health in older adults.
  • Acute benefits of fruit juices are suggested for mild cognitive impairment, but not healthy adults.
  • Optimal dietary intake recommendations are limited by data heterogeneity.