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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. (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

File photo of a marijuana plant. (Photo by PABLO PORCIUNCULA/AFP/Getty Images)

Researchers: Lower IQs Seen In Adults Who Smoked Pot As Teens

A new study has found that people who smoked marijuana during their rebellious teenage years may pay for it as adults.

01/21/2013