New research suggests early exposure has an impact on adult IQ

With millions of American children still at risk for lead poisoning, a new study suggests that the harmful effects could last well into adulthood.

Research over the past 40 years has linked lead poisoning to developmental delays, cognitive problems, and behavior issues during childhood and the teen years. But the new study, published this week in the Journal of the American Medical Association, is the first to link early lead exposure to problems later in life.

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