![]() | Lead
and the Brain How Much is Too Much? |
![]() Lead is a heavy metal that can poison the nervous system. Because lead is a serious risk to human health, it was removed from gasoline and paint. Unfortunately, the walls of 38 million homes in the United States are still coated with lead-based paint. People, especially children, may accidentally eat lead when paint dust or chips fall from these walls.
The scientists determined that children with blood lead levels of 10 ug/dl have IQs that were 7.4 points below those of children with lead levels of 1 ug/dl. These data suggest that even low levels of lead may affect intelligence and that more children may be at risk for lead poisoning than previously thought. |
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