IRCT20200922048802N1 IRCT 2020-11-05 Yazd University of Medical Sciences Evaluation of the effects of vitamin D brain mapping in children with ADHD Evaluation of the effects of vitamin D supplementation on vitamin status and brain mapping in children with ADHD 2020-10-05 anticipated 40 Complete https://irct.ir/trial/51410 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: Randomization: Simple random unit: Individual Tool: Computer-generated random number table. Randomization lists are computer-generated by a statistician, then, participants will assign to the groups of the study. A trained person, randomly will allocate and assign the participants to study groups. In order to apply the concealment in the randomization process will be used on the supplement and placebo boxes, Blinding description: Supplements of vitamin D and placebo in the same capsules in terms of size, color and shape Encodes A and B on supplements and placebo. 3 Attention-deficit hyperactivity disorder. Intervention 1: The intervention group consumes a 50,000 IU pearl of vitamin D belonging to Zahravi Company every week for 8 weeks. Intervention 2: Control group: They consume one pearl of olive oil every week, which is quite similar to the pearl of vitamin D, for 8 weeks. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no further information