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iodine salt

Although iodine deficiency remains one of the world’s top causes of preventable mental retardation, many Americans don’t realize that its use has increased their IQ’s. (Getty Images)

Study: Iodine Salt Use May Have Increased The American IQ

Although iodine deficiency remains one of the world’s top causes of preventable mental retardation, many Americans don’t realize that its use has increased their IQ’s.

07/23/2013