Vitamin D supplementation doesn't cut colds in asthma

Vitamin D supplementation doesn't cut colds in asthma
(HealthDay)—Vitamin D supplementation does not reduce cold severity or frequency among adults with mild-to-moderate asthma, according to a study published online Nov. 5 in the American Journal of Respiratory and Critical Care Medicine.

Loren C. Denlinger, M.D., Ph.D., from the University of Wisconsin in Madison, and colleagues examined whether D supplementation reduced symptom occurrence and severity among adults with mild-to-moderate asthma. Colds were assessed among 408 adults randomized to receive placebo or cholecalciferol for 28 weeks.

The researchers found that 203 adults had one or more colds. Vitamin D supplementation had no effect on the average peak Wisconsin Upper Respiratory Symptom Survey-21 scores (62.0 for placebo versus 58.7 for vitamin D; P = 0.39), despite achieving 25-hydroxyvitamin D levels of 41.9 ng/mL by 12 weeks. There was no between-group difference seen in the rate of colds (rate ratio, 1.2; 95 percent confidence interval, 0.9 to 1.5); however, an increased rate of colds was seen among African-Americans receiving vitamin D versus (rate ratio, 1.7; 95 percent confidence interval, 1.1 to 2.7; P = 0.02).

"In patients with mild-to-moderate asthma undergoing an ICS dose-reduction, these results do not support the use of vitamin D supplementation for the purpose of reducing cold severity or frequency," the authors write.


Explore further

Vitamin C is beneficial against the common cold

More information: Full Text (subscription or payment may be required)

Copyright © 2015 HealthDay. All rights reserved.

Citation: Vitamin D supplementation doesn't cut colds in asthma (2015, November 18) retrieved 27 May 2019 from https://medicalxpress.com/news/2015-11-vitamin-d-supplementation-doesnt-colds.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
7 shares

Feedback to editors

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more