Zhao R, Han X, Zhang H, Liu J, Zhang M, Zhao W, Jiang S, Li R, Cai H, You H. Association of vitamin E intake in diet and supplements with risk of dementia: A meta-analysis.
Front Aging Neurosci 2022;
14:955878. [PMID:
35978949 PMCID:
PMC9376618 DOI:
10.3389/fnagi.2022.955878]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 07/12/2022] [Indexed: 11/13/2022] Open
Abstract
Background
Dementia is a chronic progressive neurodegenerative disease that can lead to disability and death in humans, but there is still no effective prevention and treatment. Due to the neuroprotective effects of vitamin E, a large number of researchers have explored whether vitamin E can reduce the risk of dementia. Some researchers believe that vitamin E can reduce the risk of dementia, while others hold the opposite conclusion. We therefore performed a meta-analysis to clarify the relationship between them.
Methods
We searched PubMed, Embase, and Web of Science databases for articles on the connection of dietary and supplementation vitamin E with dementia risk from inception through April 2022 using the main keywords “dementia,” “Alzheimer's disease,” “vitamin E,” and “tocopherol,” and used a random-utility model for pooled effect sizes. Odds ratios (OR) and 95% confidence intervals were derived using lower and higher doses as contrasts. Obtained data were shown and assessed using Stata12.0 free software.
Results
We included 15 articles in sum. Among them, there were nine articles containing AD. By comparing the highest intake with the lowest intake, Combined ORs for high intake were as follows: dementia (OR = 0.79, 95% CI 0.70–0.88 I2 = 35.0%), Alzheimer's disease (OR = 0.78, 95% CI 0.64–0.94 I2 = 36.9%). Subgroup analyses were also performed by study type, diet and supplementation, and NOS score.
Conclusions
High vitamin E intake from diet and supplements significantly reduces the risk of dementia and Alzheimer's disease.
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