Been fascinated to find out what the fuss is re potential radiation leaks in Japan and the rush to take iodine tablets to prevent cancer. Well, trust Mary Shomon's thyroid site to have the clearest info about it. Best of all is the FDA's (US Food & Drug Administration's) 10 FAQs re potassium iodide
Most interesting is this: Potassium iodide ( KI) works only to prevent the thyroid from uptaking radioactive iodine. It is not a general radioprotective agent.