Skip to content
My WebMD Sign In, Sign Up

Asthma Health Center

Font Size
A
A
A

Vitamin D May Help Treat Some Asthma

Benefit Seen in Small Study of Patients With Steroid-Resistant Asthma
By
WebMD Health News
Reviewed by Louise Chang, MD

Dec. 8, 2005 -- Vitamin D could help treat steroid-resistant asthma, scientists report.

Their small pilot study in The Journal of Clinical Investigation shows that vitamin D may help people with steroid-resistant asthma respond better to steroid pills taken for asthma.

That's based on lab tests done on cells, as well as a brief experiment with a small group of asthma patients.

Vitamin D might also help treat other diseases involving inflammation and the immune system, write the researchers. However, their study doesn't include any recommendations about taking vitamin D supplements.

The asthma experts who led the study included Catherine Hawrylowicz, PhD, of King's College London.

Steroid-Resistant Asthma

The study focused on asthma that doesn't respond to steroid treatments.

Steroids help many people manage their asthma. Most asthma patients take their steroids through inhaled medications.

Others must take steroid pills to control their asthma, especially during acute attacks. Some of those patients don't respond to steroids. That limits their treatment options.

Testing Vitamin D

The form of vitamin D used in this study was calcitriol, or vitamin D-3. It's the form of vitamin D that the body uses. It's also the type found in many vitamin supplements.

First, the researchers took blood samples from a small group of people with and without steroid-resistant asthma.

The scientists studied the patients' T-cells, which are made by the immune system. The T-cells of people with steroid-resistant asthma weren't up to par in producing a chemical called IL-10. That chemical helps tame immune responses tied to asthma and allergies.

Next, the scientists exposed the T-cells to vitamin D-3. When that happened, the T-cells were more sensitive to steroids and boosted production of IL-10.

No breathing tests or patient surveys were done to see if people breathed better or wheezed less.

New Hope

"The hope is that this work will lead to new ways to treat people who don't respond to steroid treatment as it currently stands," Hawrylowicz says, in a news release.

"It could also help those people who are on heavy doses of steroids to reduce the amount of medication they are taking," she 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

Distressed woman
Slideshow
Woman holding an asthma inhaler
Article
 
Get Personalized Asthma Advice
Health Check
asthma overview
Slideshow
 
Los Angeles skyline in smog
Slideshow
man in a field with allergies
Slideshow
 
Black Window
Slideshow
Slideshow Allergy Myths and Facts
Slideshow
 
Man outdoors coughing
Article
Lung and bronchial tube graphic
Article
 
10 Worst Asthma Cities
Slideshow
runner
Article
 

WebMD Special Sections