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Review

Plant Foods Rich in Antioxidants and Human Cognition: A Systematic Review

1
Scientific Society for Vegetarian Nutrition, I-30171 Venice, Italy
2
Neurology Unit, Mirano Hospital, I-30035 Mirano, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandra Napolitano
Antioxidants 2021, 10(5), 714; https://doi.org/10.3390/antiox10050714
Received: 26 March 2021 / Revised: 28 April 2021 / Accepted: 29 April 2021 / Published: 30 April 2021
(This article belongs to the Special Issue Plant-Based Diets and Their Antioxidant Role in Human Health)
Oxidative stress can compromise central nervous system integrity, thereby affecting cognitive ability. Consumption of plant foods rich in antioxidants could thereby protect cognition. We systematically reviewed the literature exploring the effects of antioxidant-rich plant foods on cognition. Thirty-one studies were included: 21 intervention, 4 cross-sectional (one with a cohort in prospective observation as well), and 6 prospective studies. Subjects belonged to various age classes (young, adult, and elderly). Some subjects examined were healthy, some had mild cognitive impairment (MCI), and some others were demented. Despite the different plant foods and the cognitive assessments used, the results can be summarized as follows: 7 studies reported a significant improvement in all cognitive domains examined; 19 found significant improvements only in some cognitive areas, or only for some food subsets; and 5 showed no significant improvement or no effectiveness. The impact of dietary plant antioxidants on cognition appears promising: most of the examined studies showed associations with significant beneficial effects on cognitive functions—in some cases global or only in some specific domains. There was typically an acute, preventive, or therapeutic effect in young, adult, and elderly people, whether they were healthy, demented, or affected by MCI. Their effects, however, are not attributable only to anti-oxidation. View Full-Text
Keywords: antioxidants; phytochemicals; polyphenols; flavonoids; oxidative stress; cognition; cognitive impairment; neurodegeneration; aging antioxidants; phytochemicals; polyphenols; flavonoids; oxidative stress; cognition; cognitive impairment; neurodegeneration; aging
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MDPI and ACS Style

Baroni, L.; Sarni, A.R.; Zuliani, C. Plant Foods Rich in Antioxidants and Human Cognition: A Systematic Review. Antioxidants 2021, 10, 714. https://doi.org/10.3390/antiox10050714

AMA Style

Baroni L, Sarni AR, Zuliani C. Plant Foods Rich in Antioxidants and Human Cognition: A Systematic Review. Antioxidants. 2021; 10(5):714. https://doi.org/10.3390/antiox10050714

Chicago/Turabian Style

Baroni, Luciana, Anna R. Sarni, and Cristina Zuliani. 2021. "Plant Foods Rich in Antioxidants and Human Cognition: A Systematic Review" Antioxidants 10, no. 5: 714. https://doi.org/10.3390/antiox10050714

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