SUNDAY, May 18, 2014 (HealthDay News) — Vitamin D supplements do little to help control asthma, a new study found, although they might help cut the level of medication some patients need.
“Previous studies suggested that if you have asthma and low levels of vitamin D in the blood, you have worse lung function, more asthma attacks and more emergency room visits than asthma patients with higher vitamin D levels,” Dr. Mario Castro, a professor of pulmonary and critical care medicine at Washington University School of Medicine in St. Louis, explained in a university news release.
So, his team decided to conduct “the first randomized controlled trial to investigate whether taking vitamin D supplements can improve asthma control,” he said.
The study included more than 400 adult asthma patients at nine major medical centers in the United States. All of them had mild to moderate asthma and what was considered…
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