Children exposed to more brain-damaging chemicals than scientists thought
Back in 2006, researchers from the Harvard School of Public Health and the Icahn School of Medicine at Mount Sinai pinpointed five industrial chemicals that they linked to brain disorders such as autism, attention deficit hyperactivity disorder (ADHD), reduced IQ, and more.
These chemicals were lead, methlymercury, polychlorinated biphenyls (a coolant fluid in motors), arsenic (found naturally and also in pesticides), and toluene (in paint thinner, nail polish, and more).
In a review of their 2006 study, though, the same scientists have now discovered brain development in children could be negatively disrupted by another six chemicals. These chemicals are: chlorpyrifos, dichlorodiphenyltrichloroethane, fluoride, manganese, polybrominated diphenyl ethers, tetrachloroethylene.
Alarmingly, the researchers discovered that manganese and fluoride, both of which are present in drinking water, can lead to poorer performance in school, lower math scores, and increased hyperactivity. High levels of fluoride, in particular, are potentially capable of lowering a child's IQ by seven points.
Chlorpyrifos, meanwhile, is a common pesticide that is still used in public areas and in agriculture despite the fact that the Environmental Protection Agency banned it from residential areas in 2001. According to a report by CNN in 2012, even low levels of chlorpyrifos could result in disrupted brain development.
"It's out there and we do not know what the longer term impact is of lower levels," Virginia Rauh, professor of Clinical Population and Family Health at Columbia University Mailman School of Public Health, told CNN. "But it does seem to be associated with cognitive damage and structural changes in brain."
As RT reported this week, some health experts believe the increased rate of severe birth defects in rural Washington state could possibly be linked to prolonged exposure to pesticides, though officials have been unable to determine the precise cause.
Despite the researchers’ claim that these new chemicals can contribute to brain disorders, they admitted they could not prove a direct causal link between a chemical and any one health issue. Still, they are pushing for increased public awareness considering the potential risks.
“The consequence of such brain damage is impaired [central nervous system] function that lasts a lifetime and might result in reduced intelligence, as expressed in terms of lost IQ points, or disruption in behavior,” the study reads, cited by Time and published in the Lancet Neurology journal.
In terms of defending children from exposure, the scientists said one roadblock is the fact that regulatory agencies require a vast amount of proof in order to place restrictions on chemicals. In some cases, the EPA has even raised the level of pesticides permitted on crops grown in the United States.
“Our very great concern is that children worldwide are being exposed to unrecognized toxic chemicals that are silently eroding intelligence, disrupting behaviors, truncating future achievements and damaging societies, perhaps most seriously in developing countries,” the authors of the study wrote. “A new framework of action is needed.”