Featured Research

from universities, journals, and other organizations

Low-sodium Advice For Asthmatics Should Be Taken With A Grain Of Salt

Date:
July 19, 2008
Source:
University of Nottingham
Summary:
Following a low-sodium diet does not appear to have any appreciable impact on asthma control, according to new research. Contrary to past studies -- which have suggested a link between low-sodium diets and improved asthma control -- a new study found no evidence that cutting back on salt helps patients with their symptoms.

Contrary to past studies — which have suggested a link between low-sodium diets and improved asthma control — a new study found no evidence that cutting back on salt helps patients with their symptoms.
Credit: iStockphoto/Donald Gruener

Following a low-sodium diet does not appear to have any appreciable impact on asthma control, according to new research.

Related Articles


Contrary to past studies — which have suggested a link between low-sodium diets and improved asthma control — a new study by researchers at The University of Nottingham found no evidence that cutting back on salt helps patients with their symptoms.

Dr Zara Pogson, clinical research fellow at The University of Nottingham, said: “Despite the clear benefit of a low-sodium diet on cardiovascular risk factors, there is no therapeutic benefit in the use of a low-sodium diet…on asthma control in our study population.”

Nearly 200 subjects completed the study which compared the effect of changes in bronchial reactivity — a measure of asthma activity — on asthma patients who followed a strict low-sodium diet. Each subject either received sodium supplements to approximate normal sodium intake of 80 millimoles per litre (mmol) a day, or placebo tablets, for six weeks.

Dr Pogson and colleagues hypothesized that the subjects on the low sodium intake would show improved clinical control of asthma symptoms based on a test of asthma activity, measures of lung function, asthma symptoms and use of asthma medication. Contrary to their hypothesis, however, they detected no differences in any measures of asthma between the groups.

“We observed no difference in the outcome measures related to asthma activity in adults with asthma and bronchial reactivity who adopted a low-sodium diet for six weeks compared with those who did not, despite a final difference in daily sodium excretion of 50 mmol,” wrote Dr Pogson.

While past studies have suggested a link between low-sodium diets and improved asthma control, none were as large or tightly controlled as this study, suggesting that their findings may have been artifacts of study design rather than reflective of a true therapeutic benefit.

“We were disappointed that a simple measure, such as a decrease in sodium intake, does not result in improvements in asthma control,” said Dr Pogson. “We therefore cannot advise people with asthma to alter their sodium intake to improve control of their asthma, despite the fact that a low-sodium diet improves cardiovascular risk factors. This study suggests that further dietary research in asthma should be directed to factors other than sodium.”

According to Asthma UK, 5.2 million people in the UK have asthma — and 50 per cent of these people have severe asthma symptoms that have a major impact on their daily lives.

The results of the randomised, double-blind, placebo-controlled trial were published in the second issue for July of the American Journal of Respiratory and Critical Care Medicine by the American Thoracic Society.


Story Source:

The above story is based on materials provided by University of Nottingham. Note: Materials may be edited for content and length.


Cite This Page:

University of Nottingham. "Low-sodium Advice For Asthmatics Should Be Taken With A Grain Of Salt." ScienceDaily. ScienceDaily, 19 July 2008. <www.sciencedaily.com/releases/2008/07/080715071409.htm>.
University of Nottingham. (2008, July 19). Low-sodium Advice For Asthmatics Should Be Taken With A Grain Of Salt. ScienceDaily. Retrieved January 24, 2015 from www.sciencedaily.com/releases/2008/07/080715071409.htm
University of Nottingham. "Low-sodium Advice For Asthmatics Should Be Taken With A Grain Of Salt." ScienceDaily. www.sciencedaily.com/releases/2008/07/080715071409.htm (accessed January 24, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Saturday, January 24, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Disneyland Measles Outbreak Spreads To 5 States

Disneyland Measles Outbreak Spreads To 5 States

Newsy (Jan. 24, 2015) Much of the Disneyland measles outbreak is being blamed on the anti-vaccination movement. The CDC encourages just about everyone get immunized. Video provided by Newsy
Powered by NewsLook.com
Growing Measles Outbreak Worries Calif. Parents

Growing Measles Outbreak Worries Calif. Parents

AP (Jan. 23, 2015) Public health officials are rushing to contain a measles outbreak that has sickened 70 people across 6 states and Mexico. The AP&apos;s Raquel Maria Dillon has more. (Jan. 23) Video provided by AP
Powered by NewsLook.com
Smart Wristband to Shock Away Bad Habits

Smart Wristband to Shock Away Bad Habits

Reuters - Innovations Video Online (Jan. 23, 2015) A Boston start-up is developing a wristband they say will help users break bad habits by jolting them with an electric shock. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
This Is What It's Like To Date A Med Student

This Is What It's Like To Date A Med Student

BuzzFeed (Jan. 23, 2015) Dating is now speed-dating... or studying. Video provided by BuzzFeed
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins