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Chlorpyrifos Exposure Doubles Parkinson's Disease Risk, Study Finds

1/9/2026

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Summary

Story summary

A UCLA Health study links chlorpyrifos exposure to more than a 2.5-fold increase in Parkinson's disease risk.
Researchers analyzed data from 829 Parkinson's patients and 824 healthy individuals to assess chlorpyrifos exposure.
High exposure to chlorpyrifos from 10 to 20 years before diagnosis significantly raises risk.
The study shows chlorpyrifos damages dopamine-producing neurons.
It also disrupts autophagy, a cellular cleanup process.

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Story summary

A UCLA Health study links chlorpyrifos exposure to more than a 2.5-fold increase in Parkinson's disease risk.
Researchers analyzed data from 829 Parkinson's patients and 824 healthy individuals to assess chlorpyrifos exposure.
High exposure to chlorpyrifos from 10 to 20 years before diagnosis significantly raises risk.
The study shows chlorpyrifos damages dopamine-producing neurons.
It also disrupts autophagy, a cellular cleanup process.