more than half of subjects in this study were taking calcium and vitamin D supplements, but there was no difference in serum 25(oH)D levels between those who took and did not take supplements. A lack of difference in serum 25(oHD) levels between those receiving and not receiving vitamin D supplements was also reported in an audit from belfast.20 most of the subjects were taking between 200-400 IU of vitamin D3 (cholecalciferol), which is insufficient to normalize serum 25(OH) D levels in a vitamin D deficient population. One study from north India15 reported requirement of 60,000-120,000 IU per month to achieve vitamin D level > 30 ng/ml. In another study27 reported correction of vitamin D level to normal after 8 weeks supplementation with weekly supplementation of 60,000 IU. both these studies highlight the need of regular supplementation of at least 2000 IU/day vitamin D supplementation to maintain normal vitamin D levels