 This study found that early life exposure to a commercial formulation containing delta-methyrin, DM, and cypermethyrin, CYP, caused oxidative stress in increased levels of the protein alpha-synucline in the brains of rats. This suggests that the chemicals may be linked to neurodegenerative diseases such as Parkinson's disease. This article was authored by Fadi Hamakercha, Donatella Fidelli, Sinzianosudy, and others.