How Much Iodine Do You Need Per Day?

Once you know iodine matters, the next question is practical: how much do you actually need, where does it come from, and is your salt shaker already covering it?

The Short Answer

Most healthy adults need around 150 micrograms (mcg) of iodine per day (pregnant and nursing women need more — talk to your doctor for a specific target). Iodized salt, dairy, eggs, and seafood are the richest dietary sources. For people who can't easily meet their target through diet, iodine drops such as Lugol's Solution or Liquid Iodine offer a measurable way to supplement.

Getting Enough Iodine

Foods Highest in Iodine

Seaweed, cod, dairy products, eggs, and iodized salt are among the foods with the highest iodine content per serving.

Is Iodized Salt Enough?

For many people eating a typical diet with regular iodized salt, intake can be sufficient. But sea salt, kosher salt, and many restaurant and packaged foods use non-iodized salt, so it's easy to fall short without noticing — especially for anyone reducing sodium intake overall.

The Best Way to Increase Iodine Intake

For most people, the most reliable approach combines iodine-rich foods with a precisely dosed supplement, since food-based iodine content can vary widely by source and preparation.

Supplement Options

Iodine drops let you measure your intake down to the milligram, which is harder to do with food alone. Our comparison guide to Lugol's Solution, Liquid Iodine, and Nascent Iodine breaks down which format and strength might fit your routine.

Frequently Asked Questions

How much iodine do I need per day?

Most healthy adults are advised to aim for roughly 150 mcg per day; pregnant and nursing women typically need more. A healthcare provider can recommend a specific target for your situation.

What foods are highest in iodine?

Seaweed, cod and other seafood, dairy products, eggs, and iodized salt are among the most concentrated dietary sources.

Does iodized salt fix iodine deficiency?

For many people with mild deficiency, consistent use of iodized salt can meaningfully improve intake, though it depends on how much salt is consumed and whether other iodine sources are also part of the diet.

Is iodized salt enough to prevent deficiency on its own?

For some people, yes; for others — especially those on low-sodium diets, using non-iodized specialty salts, or with higher iodine needs — it may not be enough on its own.

What supplements help with iodine deficiency?

Iodine drops (Lugol's Solution, Liquid Iodine, or Nascent Iodine) are a common supplement format because they allow for precise, adjustable dosing. Any supplementation plan is best discussed with a healthcare provider first.

This article is for general educational purposes only and has not been evaluated by the FDA. It is not intended to diagnose, treat, cure, or prevent any disease, and is not a substitute for advice from a qualified healthcare provider — especially if you are pregnant, nursing, taking thyroid medication, or managing a thyroid condition.

Lauren Mitchell covers daily iodine intake, food sources, and supplementation for the Iodine Journal.

This article is part of our complete guide to iodine deficiency.