| Increased potassium intake from fruit and vegetables or supplements does not lower blood pressure or improve vascular function in UK men and women with early hypertension: a randomised controlled trial. | |
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MedLine Citation:
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PMID: 20673378 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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K-rich fruit and vegetables may lower blood pressure (BP) and improve vascular function. A randomised controlled trial (ISRCTN50011192) with a cross-over design was conducted in free-living participants with early stages of hypertension (diastolic BP>80 and < 100 mmHg, not receiving BP-lowering medication) to test this hypothesis. Following a 3-week run-in period on a control diet, each subject completed four dietary 6-week dietary interventions (control+placebo capsules, an additional 20 or 40 mmol K(+)/d from fruit and vegetables or 40 mmol potassium citrate capsules/d) using a Latin square design with a washout period ≥ 5 weeks between the treatment periods. Out of fifty-seven subjects who were randomised, twenty-three male and twenty-five female participants completed the study; compliance to the intervention was corroborated by food intake records and increased urinary K(+) excretion; plasma lipids, vitamin C, folate and homocysteine concentrations, urinary Na excretion, and body weight remained were unchanged. On the control diet, mean ambulatory 24 h systolic/diastolic BP were 132·3 (sd 12·0)/81·9 ((SD) 7·9) mmHg, and changes (Bonferroni's adjusted 95 % CI) compared with the control on the diets providing 20 and 40 mmol K(+)/d as fruit and vegetables were 0·8 (- 3·5, 5·3)/0·8 (- 1·9, 3·5) and 1·7 (- 3·0, 5·3)/1·5 (- 1·5, 4·4), respectively, and were 1·8 (- 2·1, 5·8)/1·4 (- 1·6, 4·4) mmHg on the 40 mmol potassium citrate supplement, and were not statistically significant. Arterial stiffness, endothelial function, and urinary and plasma isoprostane and C-reactive protein (CRP) concentrations did not differ significantly between the diets. The present study provides no evidence to support dietary advice to increase K intake above usual UK intakes in the subjects with early stages of hypertension. |
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Authors:
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Sarah E Berry; Umme Z Mulla; Philip J Chowienczyk; Thomas A B Sanders |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't Date: 2010-08-02 |
Journal Detail:
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Title: The British journal of nutrition Volume: 104 ISSN: 1475-2662 ISO Abbreviation: Br. J. Nutr. Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-12-03 Completed Date: 2011-01-10 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0372547 Medline TA: Br J Nutr Country: England |
Other Details:
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Languages: eng Pagination: 1839-47 Citation Subset: IM |
Affiliation:
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King's College London, UK. |
| Data Bank Information | |
Bank Name/Acc. No.:
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ISRCTN/ISRCTN50011192 |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Antihypertensive Agents / analysis, pharmacology Cardiovascular Diseases / prevention & control Cross-Over Studies Diet Dietary Supplements* Female Fruit / chemistry* Great Britain / epidemiology Humans Hypertension / diet therapy*, epidemiology Male Middle Aged Potassium / analysis, pharmacology* Risk Factors Vegetables / chemistry* Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Antihypertensive Agents; 7440-09-7/Potassium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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