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Thyroid function is closely linked to nutrition through the diet-gut-thyroid axis. This narrative review highlights the influence of nutritional components and micronutrients on thyroid development and function, as well as on the gut microbiota. Micronutrients such as iodine, selenium, iron, zinc, copper, magnesium, vitamin A, and vitamin B12 influence thyroid hormone synthesis and regulation throughout life. Dietary changes can alter the gut microbiota, leading not just to dysbiosis and micronutrient deficiency but also to changes in thyroid function through immunological regulation, nutrient absorption, and epigenetic changes. Nutritional imbalance can lead to thyroid dysfunction and/or disorders, such as hypothyroidism and hyperthyroidism, and possibly contribute to autoimmune thyroid diseases and thyroid cancer, yet controversial issues. Understanding these relationships is important to rationalize a balanced diet rich in essential micronutrients for maintaining thyroid health and preventing thyroid-related diseases. The synthetic comprehensive overview of current knowledge shows the importance of micronutrients and gut microbiota for thyroid function and uncovers potential gaps that require further investigation.
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http://dx.doi.org/10.3390/nu16152496 | DOI Listing |
Ann Afr Med
August 2025
Department of General Medicine, Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pune, Maharashtra, India.
Background: Prediabetes represents a transitional state in glucose metabolism with an increasing global and national prevalence, particularly in India. Recent evidence suggests that both thyroid dysfunction and chronic low-grade inflammation may play pivotal roles in the progression of prediabetes to overt Type 2 diabetes mellitus (T2DM). Thyroid hormones regulate glucose metabolism, while inflammatory markers such as white blood cell (WBC) count and high-sensitivity C-reactive protein (hs-CRP) are indicators of systemic inflammation often elevated in metabolic disorders.
View Article and Find Full Text PDFAnn Afr Med
September 2025
Department of Pediatrics, Rajendra Institute of Medical Sciences, Ranchi, Jharkhand, India.
Background And Aims: Hypothyroid patients often complain of shortness of breath, fatigue, and exercise intolerance. Both inspiratory and expiratory muscles' weakness is present, and the impairment of pulmonary function may be initiated at the subclinical stage of hypothyroidism. Hence, this study aimed to assess the pulmonary function tests (PFTs) in hypothyroid patients.
View Article and Find Full Text PDFJCI Insight
September 2025
Division of Metabolism, Endocrinology & Diabetes, and.
Intracellular trafficking of secretory and membrane proteins from the endoplasmic reticulum (ER) to the cell surface, via the secretory pathway, is crucial to the differentiated function of epithelial tissues. In the thyroid gland, a prerequisite for such trafficking is proper protein folding in the ER, assisted by an array of ER molecular chaperones. One of the most abundant of these chaperones, Glucose-Regulated-Protein-170 (GRP170, encoded by Hyou1), is a noncanonical hsp70-like family member.
View Article and Find Full Text PDFMedicine (Baltimore)
September 2025
Department of Health Statistics, School of Public Health, Shandong Second Medical University, Weifang, Shandong, China.
Both psoriasis and autoimmune thyroid diseases are characterized by chronic inflammation. The previous studies indicated a potential association between psoriasis and autoimmune thyroid diseases. However, the direction and nature of these relationships remain unclear.
View Article and Find Full Text PDFMedicine (Baltimore)
September 2025
Department of Biostatistics and Epidemiology, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Subclinical hypothyroidism (SCH) is biochemically characterized by elevated thyrotropin (thyroid-stimulating hormone [TSH]) levels, while free thyroxine (FT4) levels remain normal. Given the high prevalence of vitamin D deficiency in Iran, investigating the association between vitamin D levels and SCH may improve treatment. A case-control study was conducted at the endocrinology clinic of Imam Khomeini Hospital, affiliated with Ahvaz Jundishapur University of Medical Sciences.
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