Study questions role of vitamin D in asthma

By Genevra Pittman NEW YORK (Reuters Health) – Giving people with asthma and low vitamin D levels extra doses of the vitamin doesn’t do much to help their lungs, a new study suggests. Previous research had linked low vitamin D levels to more asthma-related problems, like weaker lungs and more asthma exacerbations. But it wasn’t clear if vitamin deficiencies were causing those problems, or if giving patients extra vitamin D was the answer. Lead author Dr. Mario Castro from Washington University School of Medicine in St. Louis, Missouri, said as many as two-thirds of his asthma patients are lacking in vitamin D. “Our thought was that vitamin D would potentially make .