Skip to content

Asthma Health Center

Watching Salt Intake Won’t Shake Asthma

Low-Sodium Diet Doesn’t Improve Asthma Symptoms, New Study Shows
Font Size
A
A
A
By
WebMD Health News
Reviewed by Louise Chang, MD

July 15, 2008 -- Cutting back on salt and following a low-sodium diet isn't likely to improve asthma symptoms, according to a new study.

Previous studies had suggested that following a low-sodium diet may help improve asthma control, but researchers now say that advice should be taken with a grain of salt.

"We were disappointed that a simple measure, such as a decrease in sodium intake, does not result in improvements in asthma control," researcher Zara E. K. Pogson, MRCP, clinical research fellow at the University of Nottingham in England, says in a news release. "We therefore cannot advise people with asthma to alter their sodium intake to better control their asthma, despite the fact that a low-sodium diet improves cardiovascular risk factors."

Diet and Asthma Control

Researchers say prior studies on low-sodium diets and asthma control have produced inconsistent results or were too small.

In this study, published in the American Journal of Respiratory and Critical Care Medicine, researchers compared the effects of a low-sodium vs. normal-sodium diet on asthma control in nearly 200 adults with asthma for six weeks. All of the participants followed a strict low-sodium diet and either received sodium supplements equivalent to normal sodium intake or a placebo.

After six weeks, researchers measured control of asthma symptoms and lung function and found no significant differences between the two groups despite the difference in sodium intake.

Researchers say the results suggest that a low-sodium diet provides no additional benefits in improving asthma control.

"This study suggests that further dietary research in asthma should be directed to factors other than sodium," Pogson says.

When Is Your Asthma Worse?

When Is Your Asthma Worse?

Take the WebMD Asthma assessment to get Personalized Action Plan

Start Now

Today on WebMD

Lung and bronchial tube graphic
5 common triggers.
group jogging in park
Should you avoid fitness activities?
 
asthma inhaler
Learn about your options.
man feeling faint
What’s the difference?
 
Los Angeles skyline in smog
Slideshow
man in a field with allergies
Slideshow
 
Woman holding inhaler
VIDEO
Slideshow Allergy Myths and Facts
Slideshow
 

Pollen counts, treatment tips, and more.

It's nothing to sneeze at.

Loading ...

Sending your email...

This feature is temporarily unavailable. Please try again later.

Thanks!

Now check your email account on your mobile phone to download your new app.

Man outdoors coughing
Article
Lung and bronchial tube graphic
Article
 
10 Worst Asthma Cities
Slideshow
runner
Article