10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 4 2013 (October - December) Vitamin D deficiency has been implicated in various diseases including cancer and auto immune diseases. The present study attempts to establish a relation between vitamin D deficiency, thyroid hormones and TSH in subclinical hypothyroidism.100 newly diagnosed patients with subclinical hypothyroidism were divided into three groups according to vitamin D levels. Mean plasma TSH and T lessThan sub greaterThan 3 lessThan /sub greaterThan values decreased with increasing vitamin D values and T lessThan sub greaterThan 4 lessThan /sub greaterThan increased with increasing vitamin D tertiles. However , intergroup comparison showed no statistically significant changes .In females, negative correlation between vitamin D and TSH was statistically significant (p=0.014).The prevalence of vitamin D deficiency, insufficiency and sufficiency in 100 patients was found to be 38%, 38% and 24%. The study indicates the prevalence of vitamin D deficiency in subclinical hypothyroidism, but further studies are needed to determine whether it is a causative factor in the pathogenesis of the disease or a consequence. SUDHA K, ANUPAMA HEGDE, POORNIMA A MANJREKAR AND RESHMA KUMARCHANDRA Vitamin D, thyroid hormones, subclinical hypothyroidism 1380-1384