en Nutrition Nutrition پژوهشي Research Background and Objectives: There is convincing evidence that subjects concomitantly affected by type 2 diabetes (T2D) and metabolic syndrome (MeS) are at greater risk for cardiovascular disease (CVD). Many metabolic derangements in T2D might be attributed to poor vitamin D status. The purpose of this study was to investigate the associations among vitamin D status, MeS and glycemic status in subjects with T2D. Materials and Methods: A total of 101 known cases of T2D (39 males, 62 females) were enrolled in a cross-sectional study by convenient sampling. Serum 25(OH)D3, glycemic markers and lipid profile were assessed. Results: Mean concentration of serum 25(OH)D3 was 42.2±33.8 nmol/L. Prevalence of undesirable vitamin D status (25(OH)D < 50nmol/L) was significantly higher among the subjects with MeS as compared to those without MeS (p=0.020). The subjects with sufficient vitamin D status had 50% lower risk for MeS compared to those who had vitamin D deficiency, and this association remained significant even after additional adjustment for body mass index (BMI), percent of fat mass or waist circumference. Conclusions: Our data showed that firstly higher vitamin D status is inversely associated with fasting glycemia, and secondly serum 25(OH)D3 predicts MeS risk in the subjects with T2D. Demonstrating the association of hypovitaminosis D with disorders of glucose metabolism and higher risk for development of further complications, notably CVD, may lead to a new target for preventive efforts at the population level. Keywords: Vitamin D, Type 2 diabetes, Metabolic syndrome, Cardiovascular disease Vitamin D, Type 2 diabetes, Metabolic syndrome, Cardiovascular disease 3 10 http://nfsr.sbmu.ac.ir/browse.php?a_code=A-10-38-1&slc_lang=en&sid=1 Bahareh Nikooyeh nikooyeh11024@yahoo.com 1003194753284600205 1003194753284600205 No انستیتو تحقیقات تغذیه و صنایع غذایی کشور Tirang.R Neyestani neytr@yahoo.com 1003194753284600206 1003194753284600206 Yes انستیتو تحقیقات تغذیه و صنایع غذایی کشور Hamid Alavi-Majd alavimajd@gmail.com 1003194753284600207 1003194753284600207 No دانشکده پیراپزشکی دانشگاه علوم پزشکی شهید بهشتی Ali Kalayi alikala13@yahoo.com 1003194753284600208 1003194753284600208 No انستیتو تحقیقات تغذیه و صنایع غذایی کشور Nastaran Shariatzadeh nsh1344@yahoo.com 1003194753284600209 1003194753284600209 No انستیتو تحقیقات تغذیه و صنایع غذایی کشور Malihe Zahedirad aban278@yahoo.com 1003194753284600210 1003194753284600210 No انستیتو تحقیقات تغذیه و صنایع غذایی کشور Soudabeh Heravi anahrad@yahoo.com 1003194753284600211 1003194753284600211 No Nima Tayebinejad s.heravifard@gmail.com 1003194753284600212 1003194753284600212 No Shabnam Salekzamani nima.tayebinejad@yahoo.com 1003194753284600213 1003194753284600213 No Mohammad Samadi sh_salekzamani@yahoo.com 1003194753284600214 1003194753284600214 No