Long-ago lead exposure, and possibly other pollutants, may hasten old-age mental decline

January 28th, 2008

Could it be that the “natural” mental decline that afflicts many older people is related to how much lead they absorbed decades before? That’s the provocative idea emerging from some recent studies, part of a broader area of new research that suggests some pollutants can cause harm that shows up only years after someone is exposed.

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