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Vitamin supplementation and blood pressure in Type 2 diabetes.
MedLine Citation:
PMID:  22413996     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Aims  Vitamin D levels are inversely related to blood pressure. Given that low sun exposure can create a greater reliance on dietary sources of vitamin D, we aimed to determine whether dietary vitamin D and blood pressure associations differ between periods of low and high sun exposure. Methods  Dietary intake, vitamin supplementation, blood pressure, and anthropometric parameters were assessed each season for 1 year (174 adults with Type 2 diabetes). Separate linear regression models were constructed for high and low sun exposure periods to examine associations of systolic blood pressure with dietary vitamin D intake and vitamin supplement use (adjusted for age, gender, BMI, ethnicity, smoking, alcohol, physical activity, antihypertensive medication and nutrient intake). Robustness of findings was confirmed with within-subject repeated measures analysis, including an interaction term for sun exposure period. Results  Vitamin D intake from food sources was low year-round and no conclusive association with blood pressure was identified during either period. Systolic blood pressure was 5.1 mmHg lower during the low sun exposure period (95% CI 0.5-9.7) in daily supplement users compared with non-users. The interaction term between supplement use and sun exposure period was significant (low sun exposure* no supplement, P = 0.02). Systolic blood pressure was relatively stable in users (low and high sun exposure periods, respectively, mean ± SE: 135.2 ± 2.6 mmHg and 134.2 ± 2.5 mmHg), but not in non-users (140.2 ± 2.7 mmHg and 130.5 ± 2.5 mmHg). Conclusions  Vitamin supplementation may stabilize systolic blood pressure in adults with Type 2 diabetes across seasons. © 2012 The Authors. Diabetic Medicine © 2012 Diabetes UK.
Authors:
S Jarvandi; L Joseph; R Gougeon; K Dasgupta
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-13
Journal Detail:
Title:  Diabetic medicine : a journal of the British Diabetic Association     Volume:  -     ISSN:  1464-5491     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8500858     Medline TA:  Diabet Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 The Authors. Diabetic Medicine © 2012 Diabetes UK.
Affiliation:
Division of Clinical Epidemiology Nutrition and Food Sciences Centre, Department of Medicine, McGill University Health Centre, Montreal, Canada.
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