Low Vitamin D Linked To Asthma

Asthmatics with higher blood levels of vitamin D have better lung function than those with lower levels, according to new research from National Jewish Health, in Denver.

E. Rand Sutherland, M.D., M.P.H, the lead author and his colleagues enrolled 54 nonsmoking asthmatics, assessed their levels of serum vitamin D [25(OH)D] and tested their lung function and airway hyper-responsiveness (both hallmarks of asthma.) They also tested the subjects' response to steroid treatment.

"Our goal was to assess whether vitamin D levels were associated with asthma severity in adults," said Dr. Sutherland, who is chief of the pulmonary division at National Jewish Heath.

They found that with decreasing levels of vitamin D, subjects performed more poorly on tests of lung function and airway hyper-responsiveness.

"We showed that in adults with asthma, lower vitamin D levels were associated with lower lung function, an increased propensity for bronchospasm and poorer steroid response," said Dr. Sutherland. Read the entire article.

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