IRCT20100408003664N25 IRCT 2021-10-23 Tabriz University of Medical Sciences The effects of vitamin D supplementation in women with hypothyroidism VITDHYPOT Effect of vitamin D supplementation on metabolic status, thyroid hormones, serum irisin and obesity indices in women with subclinical hypothyroidism 2021-11-06 anticipated 44 Complete https://irct.ir/trial/57482 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: The eligible participants will be randomly allocated to intervention and placebo groups using a software-generated random permuted blocks. The generated random sequence will be kept in a protected location and administered by an independent third party who is blind to the trial throughout the study. In order to hide, a random sequence will not be provided to the executor and will be performed sequentially for each block, Blinding description: The placebo and supplement will be packed in the same number in similar packages. The method of blindness will be that the supplements and placebo will be delivered to the participants by someone other than the researcher, and the researcher will remain unaware until the end of the study. 3 subclinical hypothyroidism. Intervention 1: Intervention group: 50000 units weekly vitamin D of Zahravi company for 3 month. Intervention 2: Control group: Intake a Placebo perl containing sunflower oil, which is similar to vitamin D supplement in terms of dosage, color and size, once a week for 12 weeks. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is The final decision will be taken after the end of the study