In this study, the authors investigated the association between vitamin D levels and asthma control in children between the ages of 5 and 15 (1). Children were followed-up for 6 months and vitamin D and pulmonary function tests were compared. The results showed that there was no specific association found, regardless of how controlled the asthma was. In other words, vitamin D levels were unrelated. The authors conclude that there is no specific association. The study was conducted in India, so it’s possible that the baseline status of the children being tested for vitamin D was higher than in other parts of the world.