ABSTRACT Over the past few decades, environmental modifications (lower availability to sunlight owing to operating indoors or use of protective clothing and sunblock; food modifications) have been mainly blamed for vitamin D and inadequacy in the wider public. Being overweight, living in the inner-city and having African American ancestry are possible causes for asthma and vitamin D insufficiency. While the musculoskeletal effects of chronic insufficiency of vitamin D are very well recognized, a variety of other illnesses, particularly respiratory problems, have recently been related to vitamin D insufficiency. The potential significance of vitamin D as an increasing mediator that supports lung health is becoming well understood. In children with asthma, vitamin D insufficiency appears to be more common. According to epidemiological data, children with asthma with low blood levels of vitamin D suffer from more pain, exacerbations, lung damage, medication usage, and severe illness. Research published in vitro has shown that adult asthmatics' steroid sensitivity is improved by vitamin D. By preventing disease, in particular by retaining regulatory T cells, and by directly inducing intrinsic antimicrobial systems, vitamin D may have a significant impact on lung health. To resolve the diagnosis and treatment significance vitamin D could have in treating asthma in the long term, more investigations are essential to completely comprehend the impacts of vitamin D in preserving airway homeostasis. Along with prospective defence mechanisms like antiviral impacts and augmented steroid attentiveness, considerable uncertainty concerning the impacts of vitamin D insufficiency and inadequacies in kids with asthma and a thorough analysis of present experimental and observational studies substantiation of relationship among vitamin D levels and asthma or bronchitis comorbidities.