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Sea Salt or Iodized Table Salt?

Sea salt and table salt both contain sodium chloride. Sea salt also contains small amounts of magnesium chloride, magnesium sulfate and calcium sulfate, which are nutritionally insignificant. Iodized salt, sea salt, kosher salt and seasoning salts are all treated the same way in your body.

You need to eat foods that contain iodine for your body to be able to make thyroid hormone. The best sources are iodized salt and seafood. Plants can be a good source, but only if they are grown on iodine-rich soil. A study in the Annals of Nutrition and Metabolism (September-October 2003) showed that vegetarians are at increased risk for iodine deficiency that causes low thyroid function. In this study, 25 percent of vegetarians and 80 percent of vegans had low blood levels of iodine, compared to only nine percent of people who eat both plant and animal products.

While iodized table salt is a good source of iodine, sea salt often is not. If you don't use table salt or eat seafood, you may want to get a blood test for iodine. If your iodine level is low, you need to add iodine sources to your diet or take iodine pills.

Checked 10/13/15

May 10th, 2013
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About the Author: Gabe Mirkin, MD

Sports medicine doctor, fitness guru and long-time radio host Gabe Mirkin, M.D., brings you news and tips for your healthful lifestyle. A practicing physician for more than 50 years and a radio talk show host for 25 years, Dr. Mirkin is a graduate of Harvard University and Baylor University College of Medicine. He is board-certified in four specialties: Sports Medicine, Allergy and Immunology, Pediatrics and Pediatric Immunology. The Dr. Mirkin Show, his call-in show on fitness and health, was syndicated in more than 120 cities. Read More
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