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Vitamin D helps control asthma flares

Many of the earlier studies on asthma have focused on young children. This large, new study is unique because the young adults who participated did not have other diseases that could complicate the findings.

Doctors compared levels of vitamin D and asthma in 308,000 men and women, aged 22 to 50. About one in 14 had asthma, and vitamin D levels were similar between those with and without asthma. But those with asthma who were also deficient in vitamin D were 25 percent more likely to have severe asthma symptoms, called flares or exacerbations. These patients required prescription oral corticosteroids, more than five prescriptions for rescue inhalers, and more than four visits to a doctor for treatment.

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