To examine the latest research on the link between vitamin D and asthma. Asthma’s growing morbidity and enormous financial cost have motivated studies to identify modifiable environmental and dietary variables that contribute to the pandemic. Many, but not all, observational and epidemiologic studies have found a link between low vitamin D levels and asthma. Several controlled clinical trials have recently been conducted to investigate the effect of vitamin D supplementation on asthma management and respiratory tract infections. While some studies indicate vitamin D supplementation’s positive function in decreasing asthma severity in children, others have found no benefit in adults.

Given the significant incidence of vitamin D deficiency in children and adults across the world, as well as recent randomised controlled studies of vitamin D in asthma, vitamin D supplementation cannot be suggested as an additional therapy for asthma.