“Iodine?”Here!
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As a supplement
Talk to your doctor or pharmacist.
Roll Call does not check drug interactions or assess personal safety.
Iodine is a mineral required by the thyroid gland to produce thyroid hormones, which regulate metabolism throughout the body.
Why it’s used
Taken to meet daily iodine requirements, particularly relevant during pregnancy and in regions with iodine-poor soil and food supply.
What the evidence is for
preventing goiter and supporting fetal neurodevelopment in deficient populations.
What the evidence says
NIH ODS documents iodine deficiency as a well-established cause of goiter and, in pregnancy, of impaired fetal brain development; correcting deficiency addresses these outcomes. Evidence for iodine supplementation benefiting people who are not deficient is limited.
Dose studied
150–1100 mcg — adult RDA up to tolerable upper intake level, per NIH ODS.
Context
Adult intake recommendations are 150 mcg per day, rising during pregnancy and lactation, with a tolerable upper intake level of 1,100 mcg per day for adults.
Rumors
Preventing the goiter and underactive thyroid of iodine deficiency, and the intellectual disability, deafness and stunted growth severe deficiency causes in a fetus.
Supports — establishedhealth and safety evidence
Studied in: iodine-deficient populations, including pregnant women and their fetuses.
Measured as an outcome.
- Iodine - Health Professional Fact Sheet (Regulatory) · Funding not checked
How much is a reference amount
- 150 mcg a dayfor adults 19 and over · Recommended Dietary Allowance
Upper limit 1,100 mcg a day, from food and supplements together.
Every applicable line is shown because we don’t know which one is yours, and a reference intake is a target for a population, not a threshold for harm.