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Exposure to a man-made chemical known as trichloroethylene, or TCE, is associated with a sixfold increased risk of developing Parkinson's disease, according to a new study published Monday in the
Annals of Neurology. TCE is a common organic contaminant that pollutes groundwater, soil, and air.
The study also found that exposure to another man-made chemical similar to TCE, known as perchloroethylene or tetrachloroethylene, or PERC, is associated with a tenfold increased risk of Parkinson's. Both chemicals are found in metal degreasers, metal cleaners, paint, spot removers, and carpet-cleaning fluids.
"The fact that we were able to find a six-to-tenfold increased risk in exposure I think is very meaningful," says Dr. Samuel M. Goldman, an associate professor of clinical research at The Parkinson's Institute and the lead author of the study.
Chemicals and solvents like TCE have been anecdotally linked to Parkinson's disease before but according to Goldman, no epidemiologic study has been done to verify the relationship until now.
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