Mayo Clinic writes that Vitamin D is found in many dietary sources, which includes fish, eggs, fortified milk, and cod liver oil. The sun is also important for the daily production of vitamin D, and as little as 10 minutes of exposure is thought to be enough to prevent deficiencies. Charles Bankhead has reported for MedPage Today on March 29, 2013, Vitamin D Levels Tied to Lung Health. Data from a large cross-sectional study have showed serum vitamin D levels had a significant positive correlation with pulmonary function, most prominently in patients with a history of tuberculosis (TB).
Churl-Min Kim, MD, PhD, of the Catholic University of Korea in Seoul, and colleagues, have reported that patients who had the highest serum levels of 25-hydroxyvitamin D (25-OHD) were found to have significantly higher forced expiratory volume at 1 second (FEV1) and forced vital capacity (FVC) in comparison with patients who had the lowest levels of 25-OHD. The researchers wrote in the Journal of Clinical Endocrinology & Metabolism that in the subgroup of patients with a history of pulmonary tuberculosis, the absolute difference in FEV1 by 25-OHD level was four times greater than the difference in the overall population.
The researchers have gone on to speculate that with regard to the findings in the TB subpopulation, the results suggest “that the susceptibility of pulmonary TB might be related to vitamin D deficiency and also that vitamin D therapy may be beneficial for lung function in this population.” They have also stated, “The precise mechanism for this phenomenon remains unknown, but it has been suggested that vitamin D accelerates recovery from infection by enhancing innate immunity via upregulation of antimicrobial peptides.”
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