As much as I would like to recommend different varieties of seaweed (not just because of their high iodine content), I can’t.
Even before Fukushima and the Gulf oil ‘spill’ seaweed has been highly contaminated with arsenic, mercury and other heavy metals.
I also highly recommend NOT to eat any other kind of seafood as it is all heavily contaminated.
At the International Academy of Oral Medicine and Toxicology in 2007 (= BEFORE Fukushima)
In this video, Sherry Tenpenny, DO speaks about the deficiency of iodine as well as the disorders that it causes. She goes into detail about the individual conditions caused by iodine deficiency and how to treat them.