Q&A: Can More Vitamin D Protect You From Colds When You Have Asthma?

 

african american woman blowing her noseIf you have asthma, vitamin D supplements won’t protect you against colds, new research suggests.

The study found that taking vitamin D supplements didn’t reduce the number or severity of colds in adults with mild-to-moderate asthma.

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More than 400 participants, all of whom had low vitamin D levels, took either vitamin D supplements or a placebo for 28 weeks. During that time, about half of them got at least one cold. Eighty-two percent of those in the supplement group had sufficient levels of vitamin D after 12 weeks, but that didn’t boost their resistance to colds, the research revealed.