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    Evaluation of seasonal relationship with vitamin D levels in Van region
    (Alanya Alaaddin Keykubat Üniversitesi, 2019) Balaharoğlu, Ragıp; Çokluk, Erdem; Alp, Hamit Hakan; Üçler, Rıfkı; Şekeroğlu, Mehmet Ramazan; Huyut, Zübeyir
    Aim: Vitamin D is a fat-soluble vitamin which is found in certain foods and can be synthesized from its precursors with exposure of sunlight. It is known that serum 25- hydroxy vitamin D (25-OH Vit D) concentration is the best indicator of Vitamin D level. Main source of Vitamin D is the synthesis to the skin with sunlight exposure. In our study we investigated the vitamin D levels of patients administered to our hospital in Van. We aimed to determine any significant difference between age, sex and seasonal differences of the 25-OH vit D levels. Materials and Method: Patients admitted to Yuzuncu Yil University Faculty of Medicine Dursun Odabas Medical Hospital from 01.01.2013 to 01.01.2014 with 25- OH vit D levels were determined and evaluated respectively. Results: Mean age for males (n=306) was found as 46.65±16.62 and for females (n=1613) as 43.58±15.03. Mean 25-OH vit D in males was found as 18.95±7.93 ng/ mL and in females it was found as 14.79±9.42 ng/ml. 25-OH vit D levels of males were found significantly higher than that of females (p<0.05). When 25-OH vit D levels were analyzed according to season, a mean of 25-OH vit D for the summer season was found significantly higher than those of the winter or autumn-spring months (p=0.006). Although Van receives one of the highest amount of sunlight due to its geographical position, we consider that there exists a deficiency in all age groups in the society, for all seasons. Conclusions: According to these findings we conclude that both nutritional support and Vitamin D supplementation is important for recovery of vitamin D deficiency in and around the city of Van.