Document Detail


Effect of vitamin D on blood pressure: a systematic review and meta-analysis.
MedLine Citation:
PMID:  19587609     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: Vitamin D insufficiency has been linked to hypertension and cardiovascular events in observational studies. It is unclear whether vitamin D supplementation can reduce blood pressure, and, if so, by how much. METHODS: We performed a systematic review and meta-analysis to examine whether vitamin D reduces blood pressure. Databases including MEDLINE, EMBASE, the Cumulative Index to Nursing and Allied Health Literature and the Cochrane library were searched, supplemented by searches of grey literature, unpublished trials and references from included studies. Studies were assessed by two reviewers independently according to a prespecified protocol. Interventions included activated vitamin D, unactivated vitamin D2 and D3 and ultraviolet B radiation. RESULTS: Eleven randomized, controlled trials fulfilled the inclusion criteria. Studies were small and of variable methodological quality. Mean baseline blood pressure was more than 140/90 mmHg in eight studies. Meta-analysis of these eight studies showed a nonsignificant reduction in systolic blood pressure in the vitamin D group compared with placebo [-3.6 mmHg, 95% confidence interval (CI) -8.0 to 0.7]. A small, statistically significant reduction was seen in diastolic blood pressure (-3.1 mmHg, 95% CI -5.5 to -0.6). Subgroup analysis suggested that unactivated vitamin D produced a greater fall in systolic blood pressure than activated vitamin D (-6.2 mmHg, 95% CI -12.32 to -0.04, vs. +0.7 mmHg, 95% CI -4.8 to 6.2). No reduction in blood pressure was seen in studies examining patients who were normotensive at baseline. CONCLUSION: We found weak evidence to support a small effect of vitamin D on blood pressure in studies of hypertensive patients.
Authors:
Miles D Witham; M Adnan Nadir; Allan D Struthers
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Publication Detail:
Type:  Journal Article; Meta-Analysis; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Journal of hypertension     Volume:  27     ISSN:  1473-5598     ISO Abbreviation:  J. Hypertens.     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-11-09     Completed Date:  2010-01-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8306882     Medline TA:  J Hypertens     Country:  England    
Other Details:
Languages:  eng     Pagination:  1948-54     Citation Subset:  IM    
Affiliation:
Section of Ageing and Health, Centre for Cardiovascular and Lung Biology, Division of Medical Sciences, University of Dundee, Ninewells Hospital and Medical School, Dundee DD1 9SY, Scotland. m.witham@dundee.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Blood Pressure / drug effects*
Humans
Hypertension / complications,  drug therapy*
Vitamin D / administration & dosage*
Vitamin D Deficiency / complications,  drug therapy*
Vitamins / administration & dosage*
Grant Support
ID/Acronym/Agency:
//British Heart Foundation
Chemical
Reg. No./Substance:
0/Vitamins; 1406-16-2/Vitamin D

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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