Abstract: Many studies have reported the altered levels of Vitamin D in diabetes mellitus. The role of vitamin D in the pathophysiology of type 2 diabetes is thought to be due to its extra skeletal effects on insulin secretion and insulin resistance. One of the mechanisms involved may be through its effect on calcium homeostasis. Calcium dependent insulin secretion and release has been proved by animal studies. This study puts in an effort to find the alterations if any of Vitamin D in diabetes mellitus.