The iodine content of plant foods depends on the iodine levels in soil and in groundwater used in irrigation, in crop fertilizers, and in livestock feed. Iodine concentrations of plants grown in soils of iodine-deficient regions may be as low as 10 µg/kg of dry weight, in contrast to that of plants grown in iodine-rich areas, which may be as high as 1000 µg/kg dry weight. [9] Most foods contain 3—75 µg of iodine per serving [10]

In some regions of the world where salt iodization is impractical, iodization of other common foods (bread and others) is targeted, or individuals receive administered oral or intramuscular iodized oil supplements.

Processed foods, such as canned soups, almost never contain iodized salt. In addition, specialty salts, such as sea salt, kosher salt, Himalayan salt, and fleur de sel, are not usually iodized. Product labels will indicate if the salt is 'iodized' or provides iodide.

"Too much iodine can cause hyperthyroidism, a hyperactive thyroid gland."

"The recommended average daily intake is 150 mcg/day for non-pregnant, non-breastfeeding adults, and we may want to stay below 600 mcg/day on a day-to-day basis, whereas a tablespoon of kelp may contain 2,000 mcg. I’d stay away from kelp because it has too much, and stay away from hijiki because it contains too much arsenic."

Question: Does Kombu [kelp] in Eden Beans contribute iodine?

Answer: Yes. Based on our third party independent laboratory analysis, the Kombu in Eden Beans contributes, on average, 48.4 mcg of iodine per 1/2 cup serving, or 32% Daily Value (DV).