Amid rising evidence that additives designed to improve plastics also disrupt sex hormones, a Rutgers laboratory trial shows that plastic itself can do likewise when inhaled at moderate levels. Previous studies focused on chemicals such as bisphenol-A (BPA) that make plastics stiffer or more flexible. These findings spurred ongoing efforts to find safer plastic additives. The Rutgers study showed that microscale and nanoscale particles (MNPs) of polyamide, a common plastic better known as nylon, produced endocrine-disrupting effects when inhaled by female lab rats in concentrations experienced by humans. The disruption of sex hormones delivered by the endocrine system could help explain health issues such as increasing obesity and declining fertility. To read the full story.