Background: Vitamin D is essential for calcium absorption, bones strengthening, hemopoiesis, protection against heart failure, prevention against upper respiratory infection, acts as anti-oxidant and strengthening immunity. Its deficiency has turn out to be epidemic globally, but still majority of population is unaware about the problem. The prevalence can be appreciated in all age groups in both the genders, such as, youngsters, adult, pregnant women and geriatric group. As vitamin D functions in bone remodeling and its normal growth, the deficiency leads to retarded growth and skeletal deformities in infants and adolescents, whereas, muscle weakness and fractures are common in adults. Present study was carried out to sensitize the medical undergraduates regarding deficiency, prevention and treatment of vitamin D