Normally, the thyroid gets the iodine necessary to produce thyroxine from dietary sources such as seaweed, seafood, shellfish, iodized salt, and some seeds and dairy, however after a nuclear fallout, large amounts of of radioactive iodine become available for uptake, with the thyroid being unable to distinguish between radioactive, and non-radioactive iodine. As a result, the thyroid will absorb and retain excessive amounts of radioiodine, with those suffering from hypothyroidism, or children, being adversely affected the most... Full Text