Vitamin D halves the risk of a severe asthma attack

The vitamin reduces the risk of a severe attack requiring hospital treatment from six per cent to three, say researchers from the Cochrane research group. They don’t know if it benefits only sufferers who are already deficient in the vitamin.

They analysed seven trials that included 435 children and two others that included 658 adults, all of whom had mild to moderate asthma. None of the people taking a supplement suffered any adverse reactions.

(Source: Cochrane Library, doi: 10.1002/14651858.CD011511.pub2)

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