Impact of Vitamin D Supplementation on Attention-Deficit Hyperactivity Disorder in Children:

Background: The role of nutrients and dietary factors in attention-deficit hyperactivity disorder (ADHD) remains unclear. Objectives: The primary objective was to evaluate the serum vitamin D level in children with a diagnosis of ADHD. The secondary objective was to detect the effect of vitamin D supplementation on cognitive function in those with vitamin D deficiency. Methods: A total of 50 children with ADHD and 40 healthy controls were included in the study. We measured the serum level of vitamin D. Patients with vitamin D deficiency were subdivided into 2 groups: one with vitamin D supplementation and the other without vitamin D supplementation. Further assessment and follow-up of children with ADHD was done. The Wisconsin Card Sorting Test, Conners’ Parent Rating Scale, and Wechsler Intelligence Scale for Children were performed at baseline and follow-up in all cohorts with an ADHD diagnosis. Results: The diagnosis of vitamin D deficiency was significantly greater in children with ADHD compared with ...