Source: Purdue University, 8/20/25
A typical morning hair-care routine can expose you to as much immediate nanoparticle pollution as standing in dense highway traffic, report Purdue University engineers. A Purdue research team led by Nusrat Jung, an assistant professor in the Lyles School of Civil and Construction Engineering, and her Ph.D. student Jianghui Liu, found that a 10–20-minute heat-based hair care routine exposes a person to upward of 10 billion nanoparticles that are directly deposited into their lungs. These particles can lead to serious health risks such as respiratory stress, lung inflammation, and cognitive decline. The team's findings are published in Environmental Science & Technology.