“In the study, healthy people aged 65-77 who drank concentrated blueberry juice every day showed improvements in cognitive function, blood flow to the brain and activation of the brain while carrying out cognitive tests.”
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Joanna L. Bowtell et al, Enhanced task related brain activation and resting perfusion in healthy older adults after chronic blueberry supplementation, Applied Physiology, Nutrition, and Metabolism(2017). DOI: 10.1139/apnm-2016-0550