Is Iodized salt Safe for Rheumatoid Arthritis (RA)?
For people with Rheumatoid Arthritis (RA), Iodized salt is worth limiting or using with caution both during a flare and in remission. Table salt fortified with iodine.
Status for RA
Why this rating?
Table salt fortified with iodine. Because extra iodine can influence thyroid function, people managing thyroid autoimmune conditions are often advised to track how much they get.
People who are sensitive to this ingredient may notice gi. Individual responses vary, so this symptom category does not replace the condition-specific rating above.
Editorial summary
This summary is editorial and is not part of the clinical review. Ratings above are unchanged.
What iodized salt is
Iodized salt is table salt with iodine added to help people get enough of an essential mineral. The National Institutes of Health Office of Dietary Supplements lists iodized salt among the sources of iodine, alongside dairy products, seafood and seaweed, and gives an adult recommended intake of 150 micrograms a day and an upper limit of 1,100 micrograms.
Why thyroid autoimmunity changes the question
The thyroid uses iodine to make hormones, and the National Institute of Diabetes and Digestive and Kidney Diseases notes that people with Hashimoto's disease and other autoimmune thyroid disorders may be sensitive to harmful side effects from iodine. For Graves' disease it lists eating large amounts of iodine-rich food such as kelp as a risk factor for an overactive thyroid. The American Thyroid Association advises against iodine and kelp supplements that supply more than 500 micrograms a day. Ordinary use of iodized salt in cooking is a much smaller exposure than supplements or seaweed, which is why the rating is a caution and not a ban.
Reading a label
Iodized salt is labeled as such, while sea salt, kosher salt and the salt used in many processed foods are typically not iodized. If your clinician has asked you to track iodine, count iodized salt together with dairy, seafood, seaweed and any multivitamin or kelp supplement, and do not change your intake on your own.
How Iodized salt is rated across conditions
The same ingredient can mean different things depending on the condition. These are the ratings for every condition that has a guide for Iodized salt.
| Condition | During a flare | In remission |
|---|---|---|
| Inflammatory Bowel Disease (IBD) | Avoid | Avoid |
| Hashimoto's Thyroiditis | Limit / Caution | Limit / Caution |
| Graves' Disease | Limit / Caution | Limit / Caution |
| Rheumatoid Arthritis (RA) | Limit / Caution | Limit / Caution |
| Multiple Sclerosis (MS) | Limit / Caution | Limit / Caution |
| Lupus (SLE) | Limit / Caution | Limit / Caution |
Related ingredients
Same ingredient family or way of affecting the body.
Other conditions
Sources
Published sources
- Harvard T.H. Chan School of Public Health, The Nutrition Source: Iodine (nutritionsource.hsph.harvard.edu/iodine/); Sarris, J., & Wardle, J. (Eds.). (2010). Clinical Naturopathy: An Evidence-Based Guide to Practice (1st ed.). Elsevier. ISBN 9780729539265. — literature
Clinical review
Reviewed by Morvarid Nikousokhantayar, MSc Nutrition, Certified Naturopath & Nutritionist — last reviewed September 25, 2026.
This is general dietary information, not medical advice. Talk to your care team about your individual triggers.
Want to check a full product against your conditions?
Scan a barcode with FoodSage to see Iodized salt and every other ingredient checked against Rheumatoid Arthritis (RA) and any second condition you set. Learn about FoodSage.
