Historically, lead was used in paint, pipes, solder, and automotive fuel, leading to widespread exposure. Despite efforts to phase out these sources, many Americans remain at risk due to aging infrastructure. The Environmental Protection Agency (EPA) has issued regulations to address this issue.
Researchers at Florida State University analyzed historical data on childhood blood-lead levels, leaded-gas use, and population statistics to estimate the lifelong impact of lead exposure on mental health. Their findings suggest that nearly every American alive in 2015 had clinically concerning levels of lead in their blood as children, leading to lower IQs and increased mental health problems.
The study estimates a significant shift in mental health across generations, with greater rates of diagnosable disorders like depression and anxiety, as well as mild distress that impairs quality of life. The researchers believe that lead exposure can have a lasting impact on brain health, contributing to changes in personality at the national level.
Lead’s effect on neurodevelopmental problems is particularly concerning, given its potential to impair brain cells and alter brain function. Health experts emphasize that no safe level of exposure exists, as even low levels can cause significant harm.
The study’s authors hope their research will inform efforts to protect future generations from lead exposure, building on the lessons learned from past environmental health issues.
Source: https://today.duke.edu/2024/12/20th-century-lead-exposure-damaged-american-mental-health