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Millions of People Will Grow Old Faster With Lead Exposure
Two studies conducted at Johns Hopkins University in Maryland and the University of Michigan have revealed that lead accelerates ageing by up to six years, and can remain in the body for years after the exposure.
The harmful effects of exposures to the metal include memory loss and difficulties with language.
The researcher say that lead has the ability to accumulate and lie hidden in the bones of the human body, and thus they were able to measure middle-aged to elderly people's past exposure, and relate it to their process of mental decline.
During a study, the Johns Hopkins researchers looked at 1,000 people aged 50 to 70, estimated past doses by scanning their shinbones, and gave them tests for their mental ability.
They found that the higher the dose the more they suffered from "accelerated ageing", with a deteriorating ability to think, learn, remember and express themselves.
They also found that the subjects who had the most lead aged up to six years faster than those with the least.
"A portion of what has been called normal ageing might in fact be due to ubiquitous environmental exposures like lead," the Independent quoted Professor Brian Schwartz, who led the research, as saying.
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