The research looked at urine samples from 519 teenagers (aged 11-17) living in farming areas in Ecuador where they use weed killers and other chemicals. The scientists also tested how well these young people could think and behave. They checked things like paying attention, remembering and learning, using language, understanding space, and social skills.
They found glyphosate in the urine of nearly all the people in the study (98.3%), and 2,4-D in about two-thirds of them (66.2%). Glyphosate was linked to issues with understanding social cues, while 2,4-D was linked to problems with paying attention, controlling impulses, using language, and remembering and learning things.
Glyphosate is a chemical that's used a lot all around the world, but it's causing arguments in many places because studies have connected it to various health problems.