There were three groups of mice, a healthy control group, and groups with iodine induced
autoimmune thyroiditis without (AIT) and with (AIT+S e) selenium.
Intake of 3 - 6 mg / day, an amount commonly consumed in Japan
without increased incidence of
autoimmune thyroiditis or hypothyroidism, may be necessary to support not only thyroid hormone production, but iodine's important antioxidant functions in the breast and other tissues in which this trace mineral is concentrated.