A study of U.S. health data has linked exposure to a certain type of pesticide to symptoms of attention-deficit hyperactivity disorder in children. When high levels of the pesticides, known as organophosphates, were found in kids’ urine, they were almost twice as likely to develop ADHD, researchers wrote in the journal Pediatrics.
There are about 40 organophosphates registered for use in the U.S., and it is not clear how the link to ADHD works, Reuters reports.
Researchers said the most likely source of exposure among the 1,139 children surveyed was insecticides and pesticides used indoors and on produce.

