American journal of respiratory and critical care medicine
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Am. J. Respir. Crit. Care Med. · Mar 2016
Randomized Controlled TrialVitamin D Supplementation and the Risk of Colds in Patients with Asthma.
Restoration of vitamin D sufficiency may reduce asthma exacerbations, events that are often associated with respiratory tract infections and cold symptoms. ⋯ Our findings in patients with mild to moderate asthma undergoing an inhaled corticosteroid dose reduction do not support the use of vitamin D supplementation for the purpose of reducing cold severity or frequency.