 Much research on vitamin D status has focused on seasonal variations in serum 25OHD levels in populations living at high altitudes and those of light-skinned Caucasian extraction, with little work done in multi ethnic populations living closer to the equator with regards to Vitamin d supplementation, prevalence, predictors and associations of hypovitaminosis D - the assumption, perhaps being vitamin D deficiency is unlikely in locations of plentiful sunshine. There is a dearth of studies on Vitamin D status in a group of subjects at especially high risk of fallsfractures i.e. post-menopausal women with osteoporosis living in South-East Asia. It is possible that differences in geography and ethnicityculture amongst women with post menopausal osteoporosis PMO in Malaysia may necessitate supplemental Vitamin D doses that differ from those prescribed to North American Caucasians. 