Research Article

Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed with Attention Deficit Hyperactivity Disorder

Volume: 9 Number: 2 August 31, 2026
TR EN

Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed with Attention Deficit Hyperactivity Disorder

Abstract

OBJECTIVE: Attention deficit hyperactivity disorder (ADHD) is one of the most common neurodevelopmental disorders of childhood. In this 
context, studies showing the possible roles of vitamin B12 and vitamin D in the pathophysiology of ADHD are noteworthy. In this study, we 
aimed to investigate the levels of vitamin B12 and vitamin D in children diagnosed with ADHD.
MATERIALS and METHODS: A total of 96 children who applied to the Child Mental Health and Diseases Polyclinic of Uşak University Training and Research Hospital were included in this retrospective study. Two groups were formed in the study: an ADHD group and a control group. Demographic data such as age and gender, and vitamin B12 and vitamin D levels of individuals in the ADHD group and the healthy group were retrospectively examined through the hospital's electronic system. Statistical analyses; The Kolmogorov-Smirnov test, Student t-test, and Mann Whitney-U test for numerical data not showing normal distribution were included.
RESULTS: There was no statistically significant difference in the mean age between the ADHD group and the control group. Vitamin B12 and vitamin D levels were found to be higher on average in the control group, and the difference between the groups was statistically highly significant (p<0.0001).
CONCLUSION: Although studies examining the relationship between ADHD and vitamin B12 and vitamin D levels are increasing in the current literature, the results show some inconsistencies. In this study, the significantly lower levels of vitamin D and vitamin B12 in the ADHD group suggest that deficiencies in these vitamins may be related to the pathophysiology of ADHD.

Keywords

Ethical Statement

This retrospective study was conducted through a review of medical records and Hospital Information Management System (HBYS) databases at Uşak University Training and Research Hospital. The study protocol was approved by the local ethics committee (approval number: 80-80-13), and the study was conducted in accordance with the Declaration of Helsinki.

References

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Details

Primary Language

English

Subjects

Clinical Sciences (Other)

Journal Section

Research Article

Publication Date

August 31, 2026

Submission Date

July 7, 2026

Acceptance Date

July 30, 2026

Published in Issue

Year 2026 Volume: 9 Number: 2

APA
Şahin, A., Uzunok, B., Artık, A., & Doğanay, S. (2026). Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed with Attention Deficit Hyperactivity Disorder. Ege Tıp Bilimleri Dergisi, 9(2), 75-82. https://izlik.org/JA23WH96XM
AMA
1.Şahin A, Uzunok B, Artık A, Doğanay S. Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed with Attention Deficit Hyperactivity Disorder. Ege Tıp Bilimleri Dergisi. 2026;9(2):75-82. https://izlik.org/JA23WH96XM
Chicago
Şahin, Arzu, Barış Uzunok, Abdülbaki Artık, and Songül Doğanay. 2026. “Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed With Attention Deficit Hyperactivity Disorder”. Ege Tıp Bilimleri Dergisi 9 (2): 75-82. https://izlik.org/JA23WH96XM.
EndNote
Şahin A, Uzunok B, Artık A, Doğanay S (August 1, 2026) Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed with Attention Deficit Hyperactivity Disorder. Ege Tıp Bilimleri Dergisi 9 2 75–82.
IEEE
[1]A. Şahin, B. Uzunok, A. Artık, and S. Doğanay, “Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed with Attention Deficit Hyperactivity Disorder”, Ege Tıp Bilimleri Dergisi, vol. 9, no. 2, pp. 75–82, Aug. 2026, [Online]. Available: https://izlik.org/JA23WH96XM
ISNAD
Şahin, Arzu - Uzunok, Barış - Artık, Abdülbaki - Doğanay, Songül. “Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed With Attention Deficit Hyperactivity Disorder”. Ege Tıp Bilimleri Dergisi 9/2 (August 1, 2026): 75-82. https://izlik.org/JA23WH96XM.
JAMA
1.Şahin A, Uzunok B, Artık A, Doğanay S. Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed with Attention Deficit Hyperactivity Disorder. Ege Tıp Bilimleri Dergisi. 2026;9:75–82.
MLA
Şahin, Arzu, et al. “Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed With Attention Deficit Hyperactivity Disorder”. Ege Tıp Bilimleri Dergisi, vol. 9, no. 2, Aug. 2026, pp. 75-82, https://izlik.org/JA23WH96XM.
Vancouver
1.Arzu Şahin, Barış Uzunok, Abdülbaki Artık, Songül Doğanay. Investigation of Vitamin D and Vitamin B12 Levels in Children Diagnosed with Attention Deficit Hyperactivity Disorder. Ege Tıp Bilimleri Dergisi [Internet]. 2026 Aug. 1;9(2):75-82. Available from: https://izlik.org/JA23WH96XM

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