Common Pesticide May More Than Double Parkinson's Disease Risk, Study Finds

Long-term exposure to the common pesticide chlorpyrifos may dramatically increase the risk of developing Parkinson's disease, according to a new UCLA Health study.

The research found that individuals with high exposure to chlorpyrifos had more than double the risk of developing Parkinson's compared to those with minimal exposure. Chlorpyrifos is one of the most widely used agricultural pesticides in the United States.

The study adds to a growing body of evidence linking pesticide exposure to neurodegenerative diseases. Previous research has also connected chlorpyrifos to developmental issues and other health problems.

Chlorpyrifos was originally developed as a nerve agent in World War II and later adapted for agricultural use. Despite restrictions in some countries, it remains in use in the United States for certain crops.

The findings raise concerns about continued agricultural use of the chemical and may prompt further regulatory review. Parkinson's disease affects millions of Americans and there is no known cure.