A recent review of evidence suggests that taking vitamin D along with asthma medication may reduce the risk of severe asthma attacks. 
.A review taken by the Cochrane research body in 9 clinical files found that the rate of asthma attacks needing steroid treatment are reduced.
It is unclear though whether taking vitamin D only helps people who are vitamin D deficient., and that more studies are needed before they can give official advice.
Please speak to your GP or pharmacist before taking the supplement.
Professor Adrian Martineau, said they found vitamin D “significantly reduced the risk of severe asthma attacks, without causing side effects”.
They found taking vitamin D reduced the risk of severe asthma attacks requiring a hospital admission or a visit to A&E from 6% to 3%.
They also found the rate of asthma attacks needing steroid treatment dropped from 0.44 to 0.28 attacks per person per year.
But they found that vitamin D did not improve lung function or day-to-day asthma symptoms.
For further information visit http://www.bbc.co.uk/news/health-37275232
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