Where is Iodine Found?

Natural iodine can be found in seawater and in sea creatures and seaweed in the form of iodides, in Chilean saltpeter and in nitrate-bearing earth (caliche), as well as in waters from salt and oil wells, and in brines from old sea deposits. Iodide is also sometimes found in vegetables grown in iodine-rich soil. In the United States, iodine is added to salt and so can be found in many processed foods as well.