Iodine or Iodide? A Laboratory Evaluation of the Content of ­Powdered Iodine Supplements

Some proponents of supplementation believe that products containing both iodine and iodide are therapeutically superior to iodide-only formulations. As a step toward evaluating this claim, we tested three commercially available products that list both iodine and iodide on the label, to determine their content.

The Role of Iodine Deficiency and Subsequent Repletion in Autoimmune Thyroid Disease and Thyroid Cancer

Iodine is an essential trace mineral that is necessary for thyroid hormone production. With the prevalence of iodine deficiency worldwide, universal salt iodization programs were successfully implemented to reduce the incidence of iodine deficiency disorders; however, unexpected increases in the prevalence of thyroid autoimmunity occurred, and iodine excess was implicated as the causative factor. Despite these observations, epidemiological studies are inconsistent, and the etiology of autoimmune thyroid disease remains undefined. A review of observational and in vitro studies revealed that iodine alone is not responsible for thyroid autoimmunity.

The Role of Selenium in Thyroid Autoimmunity: A Review

Abstract Autoimmune thyroid diseases, including Graves’ disease and Hashimoto’s thyroiditis, are the most common autoimmune conditions in humans. There is significant morbidity associated with thyroid autoimmunity, and typically ongoing management is required to control disease presentation and reduce sequelae. Thyroid tissues contain the highest concentration of selenium in the body,…

Thyroid Hormone Transport into Cellular Tissue

Abstract New research is demonstrating that thyroid hormone transport across cellular membranes plays an important role in intracellular triiodothyronine (T3) levels of peripheral and pituitary tissues and is proving to have considerable clinical significance. Reduced T4 and T3 transport into the cells in peripheral tissues is seen with a wide…

Peripheral Thyroid Hormone Conversion and Its Impact on TSH and Metabolic Activity

Abstract There have been recent advances in understanding of the local control of thyroid activity and metabolism, including deiodinase activity and thyroid hormone membrane transport. The goal of this review is to increase the understanding of the clinical relevance of cellular deiodinase activity. The physiologic significance of types 1, 2…