Vitam in D deficiency has become one of the major health concerns among children and adolescents worldwide.Many studies have described variation in vitamin D status in different ethnic population and geographical location, as well as its association with the degree of adiposity (BMI).However, to date, there is limited data concerning vitamin D status of Asian children/adolescents especially from the South East Asian countries.This talk will focus on the studies on vitamin D status of the multiethnic children and adolescents in Malaysia (tropical country) and its association with gender, ethnicity and body mass index (BMI).The hope is to show that, despite its sunlight abundance, Vitamin D deficiency is highly prevalent in Malaysian children and adolescents.