Dec. 6, 2023 -- New research shows that so-called 'forever chemicals' commonly found in many consumer products are linked to lower bone mineral density over time in adolescents. These chemicals are known as per- and polyfluoroalkyl substances (PFAS). They are manufactured and used in food packaging, cosmetics, and other everyday items. Previous studies have linked these substances to reproductive issues, higher cancer risk, and lower bone mineral density, mainly focusing on older, non-Hispanic white populations. Dr. Chatzi, the senior author of the study at the Keck School of Medicine at USC, said: 'This is a population completely understudied in this area of research, despite having an increased risk for bone disease and osteoporosis.' Researchers looked at two groups of young people, most of whom were Hispanics who face greater risk of bone disease in adulthood. In a group of 304 adolescents, PFAS exposure was linked to lower density over time. Among 137 young adults, it was linked to lower baseline density but not to differences over time. Researchers say the study highlights that the association is occurring even when bones are developing. They call for stricter regulation of PFAS, which are found in public drinking water, food, and soil across the country. According to Eureka Alerts, bone density increases during adolescence and starts decreasing around age 30. Chatzi said, 'PFAS are ubiquitous – we are all exposed to them. We need to eliminate that exposure to allow our youth to reach their full potential in terms of bone development to help them avoid osteoporosis later in life.'