Properties of Iodine

There are many properties of iodine that make it an important component of human nutrition.

• trace mineral

• crucial component of thyroid hormones – converted to thyroxine

• a proper functioning thyroid regulates metabolism, growth, reproduction and the synthesis of protein

• protects against toxic effects of radioactive materials

• needed for production of energy in the cells

• hypothyroidism and iodine deficiency are linked

• iodine and thyroid are linked: deficiency can produce hypothyroidism (slow thyroid producing too little hormones), goiter and other conditions Nutr 1995

• deficiency symptoms of iodine include, among others, the fact that in pregnancy deficiency can cause physical and mental retardation in baby Am J Clin Nutr 1996


• as potassium iodide - the most bioactive form


• Adults 150 mcg/day; Pregnant women 220 mcg/day

• Teens 120-150 mcg/day

• Children 1-4 years 90 mcg/day; 4+ years 90 mcg/day

Dosage by Supplements

As potassium iodide:

• Adults 225 mcg/day

• Teens 150 mcg/day

• Children 1-4 years 50 mcg/day; 4+ years 100 mcg/day


• no reported cases of iodine toxicity

• too high intake could cause hyperthyroidism (over-active thyroid) or goiter. Consult your MD with any concern about levels and amounts.

More Information

You will find lots more information, including full citations and summaries of studies from medical journals in my book It’s About Health. But you can also continue to surf the 200 free pages of this website for lots of valuable, evidence-based information. It’s About Health

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