Please note: Dietary sources of iodine do not provide sufficient iodine to saturate the thyroid enough to prevent radioactive iodine absorption. For instance, a teaspoon of iodized salt provides approximately 6 g of salt, which contains only about 520 mcg of potassium iodide, so a 130 mg tablet of potassium iodide provides 250x more potassium iodide, while the use of sea salt would require 30x the amount of iodized salt, which would make potassium iodide tablets 7500x stronger than sea salt. The same applies to other dietary sources of iodine such as kelp, or seafood, where enormous amounts would have to be consumed to achieve a thyroid-protective effect... Full Text