Fluoride vs. Iodine: The Correlation with Hashimoto's Syndrome

Objective: To address the correlation between fluoride and iodine, showing how the interaction between them can cause thyroid problems such as Hashimoto's Syndrome. Methodology: In order to provide only relevant, current and scientifically based information, searches were carried out in the following databases to obtain undergraduate theses, master's dissertations, doctorates, post-doctorates and other articles published in magazines, newspapers and other reliable and renowned information bases such as: Web of Science, The Cochrane Library, Scielo, PUBMED Central, BVS/BIREME, PROSPERO, Science Direct, Nature in conjunction with Google Academy. Results: Studies show that there is a correlation between high exposure to fluoride and thyroid problems, through evidence that leads to the understanding that fluoride disrupts iodine metabolism, affecting the functioning of the thyroid gland. Conclusion: Iodine is a mineral that is essential for the human body, and it is a major contributor to the thyroid's hormone production. Fluoride is an element used in most toothpastes (fluoridated) and in drinking water in most regions, as it helps prevent tooth decay. Thus, it is seen that both fluoride and iodine have their importance in human life and functioning, however, a lack or excess of them can trigger serious problems, especially in the thyroid gland. Thus, it is seen as a conclusion that fluoride and iodine may be related to Hashimoto's syndrome because both influence the function of the thyroid gland.