Vitamin D supplements may prevent asthma worsening for some
"Vitamin D supplements protect against severe asthma attacks," The Daily Telegraph reports.
The headline was prompted by a review that pooled data from seven trials comparing taking vitamin D supplements with a placebo in people with asthma.
The researchers wanted to see whether vitamin D reduced the risk of severe asthma episodes that needed hospitalisation or treatment with oral steroids, referred to as "asthma exacerbations".
Overall, the researchers found vitamin D supplements reduced the risk of asthma exacerbations by 26%. Further analysis found the protective effect was only seen in people who were vitamin D deficient to start with.
But the main limitation of this evidence is the small number of exacerbations that occurred. For example, in two trials there were no asthma exacerbations, in another only a single event.Read Full Article