The prevalence of low serum levels of vitamin D, vitamin B12, folate and ferritin in adolescents: single center experience.

Background. In this study, the aim was to evaluate the prevalence of vitamin D, vitamin B12, ferritin, and folate deficiencies in adolescence to clarify the need for early diagnosis and therapy. Methods. The medical records of adolescents between 10 and 18years of age between 01 September 2018 and 28 February 2019 as healthy with non-specific complaints, or due to well-child care visits, were analyzed retrospectively. Results. A total of 1847/2507 (73.6%) adolescents were included in the study. The prevalence of vitamin D deficiency was 25.7% (n: 178/691). Vitamin B12 deficiency prevalence was 69.2% (n: 753/1088). The prevalence of anemia and ferritin deficiency was 4.8% and 13.26%. The prevalence of folate deficiency was 37.9% (n: 413/1088). VDD prevalence was statistically significantly higher in females than males (F/M:116/62). VB12D prevalence, the number and mean age of females with hemoglobin deficiency, and low ferritin levels was found to be statistically significantly higher in...