IRCT20201108049311N3 IRCT 2021-02-06 Tabriz University of Medical Sciences Evaluation of the relationship between Serum Levels of Total Antioxidants and Vitamin D supplementation in Hemodialysis Patients Evaluation of the relationship between Serum Levels of Total Antioxidants and Vitamin D supplementation in Hemodialysis Patients 2020-12-30 anticipated 86 Complete https://irct.ir/trial/53285 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: In this study, randomization will be by blocking method and groups division will be perform with an equal number of patients individually. Patients will divided by random digit table. Thus, the statistical population and sample size will be determined first and they will be respectively given a code or serial number. Then, the entered codes will be selected randomly from the table. This study will be double-blinded and all participants and individuals evaluating consequences of the intervention will be unaware from the allocation of study groups. Randomly allocation concealment will also go on with the method of not determining study groups before selecting patients and included individuals will be randomly grouped after sampling in this study, Blinding description: En All names and personal data of patients will encode during gathering data and will remain totally private. In addition, none of the participants will be grouped at the beginning of study. 3 Hemodialysis patients. Intervention 1: Intervention group: Colecalciferol drug of Iran Hormone Pharmaceutical Company (orally pearl and capsule-like once a week (50000 units) for 12 weeks). Intervention 2: Control group: Placebo (Orally once a week). No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no more information