"Selenium deficiency" refers to a condition where the body does not have enough selenium, which is an important mineral for our health. Full definition
Although some people have reported feeling better with iodine supplementation, caution is warranted as it can cause some people to go into a flare (especially in the presence of selenium deficiency). (heyhashi.org)
In fact, vitamin E deficiency affects the thyroid more severely when it is accompanied by selenium deficiency. (progressivehealth.com)
While there are many lifestyle and environmental factors that lead to unwanted selenium deficiency, selenium toxicity is not desirable either. (fxnutrition.com)