Vitamin D deficiency may worsen asthma (People’s Daily) Lower levels of Vitamin D may worsen asthma and hinder response to steroid treatment, a new study finds. For the study, researchers at the National Jewish Health (NJH) in Denver took the vitamin D levels of 54 asthmatics and assessed lung function, airway hyper-responsiveness, which is the prevalence of airway constriction, and response to steroid treatment. The study found that people with low ... [News Source]