All articles tagged with #hair analysis
University of Utah researchers analyzed decades of hair samples from Utah families to track lead exposure; hair lead levels rose before 1970 but fell after EPA regulations, declining from about 50 ppm to under 1 ppm after 2020, demonstrating the public health benefits of eliminating lead from gasoline and other products.
A University of Utah study analyzed 100-year hair samples from Salt Lake City residents and found lead levels were high before EPA rules on leaded gasoline, then declined sharply after the regulations: about 50 ppm in the 1970s dropping to ~10 ppm in the 1990s, with post-2020 averages around 13 ppm. The findings support the public-health benefits of banning leaded fuel, though leaded aviation fuel and other sources still exist globally (e.g., Algeria only fully banned by 2021, and roughly a quarter-million airplanes still use leaded gas).