Abstract
Objective: Current guidelines recommend vitamin D supplementation during the adolescence period. Studies showed that the deficiencies of vitamins D and B12 are common in children in developing countries. On the other hand it is important to have optimum levels of vitamin D and B12 during the puberty. This study aims to evaluate the vitamin D and vitamin B12 levels of adolescents admitted to the outpatient department. Material and Method: The study was carried out in the Istanbul Medical Faculty, Department of Adolescent Health outpatient clinic between January to December 2014. The records of the adolescents aged 10-20 years were analyzed retrospectively. Of 187 adolescents were evaluated for vitamin 25 OH D and 219 were evaluated for vitamin B12. Results: Of 187 adolescents 56% had 25-OH vitamin D level ≤20 ng/ml, and 36% between 20-30 ng/ml. There were no statistically significant difference between genders or months in a year. Serum vitamin B12 levels were below the optimal level (
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