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Review
. 2015 Aug 27;7(9):7197-208.
doi: 10.3390/nu7095333.

Associations between B Vitamins and Parkinson's Disease

Liang Shen  1
Affiliations
Review

Associations between B Vitamins and Parkinson's Disease

Liang Shen. Nutrients. .

Abstract

B vitamins may correlate with Parkinson's disease (PD) through regulating homocysteine level. However, there is no comprehensive assessment on the associations between PD and B vitamins. The present study was designed to perform a meta-analytic assessment of the associations between folate, vitamin B6, and vitamin B12 and PD, including the status of B vitamins in PD patients compared with controls, and associations of dietary intakes of B vitamins and risk of PD. A literature search using Medline database obtained 10 eligible studies included in the meta-analyses. Stata 12.0 statistical software was used to perform the meta-analysis. Pooled data revealed that there was no obvious difference in folate level between PD patients and healthy controls, and PD patients had lower level of vitamin B12 than controls. Available data suggested that higher dietary intake of vitamin B6 was associated with a decreased risk of PD (odds ratio (OR) = 0.65, 95% confidence intervals (CI) = (0.30, 1.01)), while no significant association was observed for dietary intake of folate and vitamin B12 and risk of PD. PD patients had lower level of vitamin B12 and similar level of folate compared with controls. Dietary intake of vitamin B6 exhibited preventive effect of developing PD based on the available data. As the number of included studies is limited, more studies are needed to confirm the findings and elucidate the underpinning underlying these associations.

Keywords: B vitamins; Parkinson’s disease; dietary intake; meta-analysis.

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Figures

Figure 1
Figure 1
Search strategy for meta-analysis.
Figure 2
Figure 2
Pooled estimate of standardized mean difference (SMD) and 95% confidence interval (CI) of Parkinson’s disease (PD) and folate level in plasma.
Figure 3
Figure 3
Pooled estimate of standardized mean difference (SMD) and 95% confidence interval (CI) of Parkinson’s disease (PD) and vitamin B12 level in plasma.
Figure 4
Figure 4
Forest plots of dietary intakes of folate and risk of Parkinson’s disease (PD).
Figure 5
Figure 5
Forest plots of dietary intakes of vitamin B12 and risk of PD.
Figure 6
Figure 6
Forest plots of dietary intakes of vitamin B6 and risk of PD.
See this image and copyright information in PMC

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