Piekarska Małgorzata, Maksymowicz Marcela, Kasperski Radosław, Pikulicka Agata, Pacek Katarzyna. The correlation between vitamin D and autoimmune thyroid function – short review. Journal of Education, Health and Sport. 2021;11(9):401-408. eISSN 2391-8306. DOI http://dx.doi.org/10.12775/JEHS.2021.11.09.051 https://apcz.umk.pl/JEHS/article/view/JEHS.2021.11.09.051 https://zenodo.org/record/5520088 The journal has had 5 points in Ministry of Science and Higher Education parametric evaluation. § 8. 2) and § 12. 1. 2) 22.02.2019. © The Authors 2021; This article is published with open access at Licensee Open Journal Systems of Nicolaus Copernicus University in Torun, Poland Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author (s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non commercial license Share alike. (http://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited. The authors declare that there is no conflict of interests regarding the publication of this paper. Received: 15.09.2021. Revised: 21.09.2021. Accepted: 22.09.2021. The correlation between vitamin D and autoimmune thyroid function – short review Małgorzata Piekarska1, Marcela Maksymowicz1, Radosław Kasperski1, Agata Pikulicka1, Katarzyna Pacek1 Małgorzata Piekarska1, ORCID: 0000-0001-5055-4923, piekarska13@gmail.com Marcela Maksymowicz1, ORCID: 0000-0003-2611-1609, marcela.maksymowicz@gmail.com Radosław Kasperski1, ORCID: 0000-0002-7364-3205, r.kasperski95@gmail.com Agata Pikulicka1, ORCID: 0000-0003-1693-8127, agapikulicka@gmail.com Katarzyna Pacek1, ORCID: 0000-0001-6947-558X , kasia.pacek1@gmail.com 1 Student Scientific Association at the Department of Endocrinology of the Medical University of Lublin, Poland Abstract Vitamin D is traditionally associated with the regulation of mineral metabolism and bone homeostasis, and its deficiency is the cause of diseases such as osteoporosis or osteomalacia. However, numerous studies in recent years suggest that thanks to the common expression of the vitamin D receptor (VDR) on the cells of the body and the related additional anti-inflammatory, immunomodulating, antioxidant, anti-fibrotic vitamin D effects, it may play a role in the development and progress of autoimmune diseases and tumors. The collected data suggest that low vitamin D levels correlate with the occurrence of autoimmune diseases of the thyroid gland and that there is a significant correlation between 25(OH)D and anti-TPO or anti-Tg levels. However, these data are inconclusive and further research is needed to confirm this relationship and determine whether lowered vitamin D titer is the cause or rather the consequence of autoimmune thyroid disorders, and whether vitamin D supplementation could prove to be an effective prophylaxis and treatment. Keywords: vitamin D, autoimmune thyroid disease, Graves’ disease, Hashimoto’s disease