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The impact of a vegetarian diet on thyroid health - a review of current literature.

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Title: The impact of a vegetarian diet on thyroid health - a review of current literature.
Authors: Palacz, Bartosz1 bartoszpalacz98@gmail.com, Trela, Katarzyna2 kasia.tam@gmail.com, Kubiś, Natalia Marianna natalia.kubis.nk@gmail.com, Wrona, Julia Anna julkawrona@wp.pl, Polus, Aleksander3 aleksander.polus98@gmail.com, Perz, Wiktor1 wiktorperz7@gmail.com, Teper, Maria Magdalena teper.m@interia.pl, Korolchuk, Anhelina angelinakorolchuk19@gmail.com, Gluzicka, Anna4 annagluzicka1234@gmail.com, Matyas, Anna5 annawiktoria.matyas@gmail.com, Piotrowski, Jędrzej6 jpiotr123@wp.pl
Source: Journal of Education, Health & Sport. 2026, Vol. 91, p1-14. 14p.
Subject Terms: Thyroid gland, Micronutrients, Iodine deficiency, Autoimmune thyroiditis, Vitamin B12 deficiency, Selenium, Vegetarian foods
Abstract: Background: Thyroid dysfunction is one of the most common endocrine disorders and represents an important public health issue. Its etiology is multifactorial and includes genetic, immunological, environmental, and dietary factors. A vegetarian diet, rich in plant-based foods, provides bioactive compounds with antioxidant and anti-inflammatory properties that may influence immune regulation. However, poorly balanced vegetarian diets may result in deficiencies of nutrients essential for thyroid function, including iodine, selenium, and vitamin B12. Aim: This study aims to review current scientific evidence on the effects of a vegetarian diet on thyroid function, focusing on potential benefits, risks, and the role of supplementation. Materials and methods: A narrative literature review was conducted using publications from PubMed, Scopus, and Web of Science databases published between 2010 and 2025. Articles addressing vegetarian diets, thyroid function, autoimmune thyroid diseases, and micronutrient supplementation were analyzed. Results: Evidence suggests that a vegetarian diet may have both beneficial and adverse effects on thyroid health. Benefits include higher intake of antioxidants, lower body weight, and a potentially reduced risk of hyperthyroidism. Conversely, vegetarians show a higher risk of deficiencies in iodine, selenium, vitamin B12, and omega-3 fatty acids, which may contribute to hypothyroidism and exacerbate autoimmune thyroid diseases. Regular monitoring and targeted supplementation are therefore recommended. Conclusions: A well-planned vegetarian diet can support thyroid health when appropriate supplementation is ensured. Increased awareness of potential nutrient deficiencies, particularly in individuals with thyroid disorders and in pregnant women, is essential. Further research is needed to establish optimal dietary strategies for thyroid health in vegetarian populations. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Education, Health & Sport is the property of Nicolaus Copernicus University in Torun and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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DbLabel: Education Research Complete
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PubType: Academic Journal
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  Data: The impact of a vegetarian diet on thyroid health - a review of current literature.
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  Data: <searchLink fieldCode="AR" term="%22Palacz%2C+Bartosz%22">Palacz, Bartosz</searchLink><relatesTo>1</relatesTo><i> bartoszpalacz98@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Trela%2C+Katarzyna%22">Trela, Katarzyna</searchLink><relatesTo>2</relatesTo><i> kasia.tam@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Kubiś%2C+Natalia+Marianna%22">Kubiś, Natalia Marianna</searchLink><i> natalia.kubis.nk@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Wrona%2C+Julia+Anna%22">Wrona, Julia Anna</searchLink><i> julkawrona@wp.pl</i><br /><searchLink fieldCode="AR" term="%22Polus%2C+Aleksander%22">Polus, Aleksander</searchLink><relatesTo>3</relatesTo><i> aleksander.polus98@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Perz%2C+Wiktor%22">Perz, Wiktor</searchLink><relatesTo>1</relatesTo><i> wiktorperz7@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Teper%2C+Maria+Magdalena%22">Teper, Maria Magdalena</searchLink><i> teper.m@interia.pl</i><br /><searchLink fieldCode="AR" term="%22Korolchuk%2C+Anhelina%22">Korolchuk, Anhelina</searchLink><i> angelinakorolchuk19@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Gluzicka%2C+Anna%22">Gluzicka, Anna</searchLink><relatesTo>4</relatesTo><i> annagluzicka1234@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Matyas%2C+Anna%22">Matyas, Anna</searchLink><relatesTo>5</relatesTo><i> annawiktoria.matyas@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Piotrowski%2C+Jędrzej%22">Piotrowski, Jędrzej</searchLink><relatesTo>6</relatesTo><i> jpiotr123@wp.pl</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Education%2C+Health+%26+Sport%22">Journal of Education, Health & Sport</searchLink>. 2026, Vol. 91, p1-14. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Thyroid+gland%22">Thyroid gland</searchLink><br /><searchLink fieldCode="DE" term="%22Micronutrients%22">Micronutrients</searchLink><br /><searchLink fieldCode="DE" term="%22Iodine+deficiency%22">Iodine deficiency</searchLink><br /><searchLink fieldCode="DE" term="%22Autoimmune+thyroiditis%22">Autoimmune thyroiditis</searchLink><br /><searchLink fieldCode="DE" term="%22Vitamin+B12+deficiency%22">Vitamin B12 deficiency</searchLink><br /><searchLink fieldCode="DE" term="%22Selenium%22">Selenium</searchLink><br /><searchLink fieldCode="DE" term="%22Vegetarian+foods%22">Vegetarian foods</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Background: Thyroid dysfunction is one of the most common endocrine disorders and represents an important public health issue. Its etiology is multifactorial and includes genetic, immunological, environmental, and dietary factors. A vegetarian diet, rich in plant-based foods, provides bioactive compounds with antioxidant and anti-inflammatory properties that may influence immune regulation. However, poorly balanced vegetarian diets may result in deficiencies of nutrients essential for thyroid function, including iodine, selenium, and vitamin B12. Aim: This study aims to review current scientific evidence on the effects of a vegetarian diet on thyroid function, focusing on potential benefits, risks, and the role of supplementation. Materials and methods: A narrative literature review was conducted using publications from PubMed, Scopus, and Web of Science databases published between 2010 and 2025. Articles addressing vegetarian diets, thyroid function, autoimmune thyroid diseases, and micronutrient supplementation were analyzed. Results: Evidence suggests that a vegetarian diet may have both beneficial and adverse effects on thyroid health. Benefits include higher intake of antioxidants, lower body weight, and a potentially reduced risk of hyperthyroidism. Conversely, vegetarians show a higher risk of deficiencies in iodine, selenium, vitamin B12, and omega-3 fatty acids, which may contribute to hypothyroidism and exacerbate autoimmune thyroid diseases. Regular monitoring and targeted supplementation are therefore recommended. Conclusions: A well-planned vegetarian diet can support thyroid health when appropriate supplementation is ensured. Increased awareness of potential nutrient deficiencies, particularly in individuals with thyroid disorders and in pregnant women, is essential. Further research is needed to establish optimal dietary strategies for thyroid health in vegetarian populations. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Education, Health & Sport is the property of Nicolaus Copernicus University in Torun and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.12775/JEHS.2026.91.70695
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      – Code: eng
        Text: English
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        PageCount: 14
        StartPage: 1
    Subjects:
      – SubjectFull: Thyroid gland
        Type: general
      – SubjectFull: Micronutrients
        Type: general
      – SubjectFull: Iodine deficiency
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      – SubjectFull: Autoimmune thyroiditis
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      – SubjectFull: Vitamin B12 deficiency
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      – SubjectFull: Selenium
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      – SubjectFull: Vegetarian foods
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              Text: 2026
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