Selenium Iodine

"Selenium sources include meat, seafood, eggs, and nuts. The recommended intake for adults is 55 mcg/day. Selenium is essential for thyroid hormone activity. Deficiency can cause fatigue, muscle pain, weakness, and Keshan disease. Populations where the soil is low in selenium are at risk for deficiency. Toxicity can cause nausea, diarrhea, vomiting, and fatigue; the UL is 400 mcg/day. Iodine sources include iodized salt, seaweed, and dairy products. The recommended intake is 150 mcg/day. Iodine is involved in making thyroid hormone, metabolism, growth, and development. Deficiency can cause goiter and cretinism, as well as fatigue, depression, weight gain, itchy skin, and a low heart rate. Populations where the soil is low in iodine and iodized salt is not used are at risk for deficiency. Toxicity can cause an enlarged thyroid; the UL is 1110 mcg/day."