A new analysis based on animal studies
suggests that showering in manganese-contaminated water for a decade or
more could have permanent effects on the nervous system. The damage may
occur even at levels of manganese considered safe by the Environmental
Protection Agency, according to researchers from Wake Forest University
School of Medicine (NC).
“If our results are confirmed, they
could have profound implications for the nation and the world,” said
John Spangler, M.D., an associate professor of family medicine. “Nearly
9 million people in the United States are exposed to manganese levels
that our study shows may cause toxic effects.”
The study is the first to show the potential for permanent
brain damage from breathing vaporized manganese during a shower. It was
conducted by reviewing the medical literature and calculating, based on
animal studies, the amount of manganese people would absorb by
showering 10 minutes a day.