IRCT20180228038900N1 IRCT 2018-04-16 Babol University of Medical Sciences Therapeutic effect of vitamin D on Hashimoto thyroiditis - Therapeutic effect of vitamin D on Hashimoto thyroiditis 2018-04-21 anticipated 30 Complete https://irct.ir/trial/30317 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Not used, Assignment: Single, Purpose: Treatment, Other design features: -. 2 Hashimoto thyroiditis. Intervention group: Low levels of vitamin D treatment: First, check blood levels of vitamin D at levels below 30 ng / ml: 1. Low levels of vitamin D between 20 and 30 ng / ml. Pearl contains 50000 units of vitamin D per week for up to 6 weeks, and then checks the blood levels of vitamin D. If the level of vitamin D is increased to above 30 ng, one pearl of vitamin D is given two months until the end of the design (end of 6 months). 2. Low levels of vitamin D lower than 20 ng / ml: Perl vitamin D is 50,000 units per week for one week to 8 weeks and then checks for vitamin D levels. If vitamin levels rise to above 30 ng / ml, Pearl vitamin D is given every month at the end of the plan. Note: If the level of vitamin D does not increase above 30 ng / ml after 6 to 8 weeks in the group, another course of treatment will be performed as described above, and the blood level of vitamin D will be checked again.. No - There is not a plan to make this available Justification or reason for not sharing IPD is -