MineralNo.023
Iodine
Thyroid hormones, metabolism.
Typical / RDA150 mcg
Upper limit1,100 mcg
EvidenceModerate
How to take it
Timing With a mealFood OptionalForm Potassium iodide
What to know
Iodized salt and seafood cover most people. Both too little and too much disrupt the thyroid, so supplementing without a known need can backfire.
Interactions & cautions
- Excess (e.g. kelp mega-doses) can trigger thyroid dysfunction.
Do you actually need it?
Use iodized salt? You likely already get enough.
Reference values: NIH Office of Dietary Supplements, adult general population. Educational information only — not medical advice. Confirm with a healthcare professional.