The latest research conducted by Boston University School of Public Health has shed light on the ongoing exposure of adults to per- and polyfluoroalkyl substances (PFAS) through their diet and drinking water. While the levels of older “forever” chemicals in food have decreased over the past two decades, the study found that drinking water, as well as certain foods like seafood, eggs, and brown rice, continue to contribute to PFAS exposure in adults. This highlights the importance of addressing newer replacement PFAS compounds that may be entering the food chain.
PFAS are a class of long-lasting chemicals used in various industries and consumer products, known for their harmful effects on human health. The study, published in the journal Environmental Science & Technology, analyzed the association between diet, drinking water, and “legacy” PFAS in the blood samples of California residents. The results showed that PFAS exposure was linked to the consumption of specific foods, with higher levels observed in individuals living in areas where PFAS were detected in the drinking water supply.
The research underscored the need for current data on sources of PFAS exposure to better understand and mitigate their detrimental effects on health and the environment. Lead author Dr. Emily Pennoyer emphasized the importance of regulating PFAS in drinking water to reduce overall exposure levels. These “forever chemicals” have been linked to various health conditions, including cancer, liver damage, thyroid disease, and reproductive complications.
The study involved 700 adult participants from the California Regional Exposure Study, conducted between 2018 and 2020, to assess environmental chemical exposure and its impact on public health. The findings revealed associations between legacy PFAS levels and the consumption of seafood, eggs, and brown rice. While the results showed a decline in PFAS exposure through food compared to previous studies, concerns about PFAS in certain food groups remain.
The researchers also highlighted the importance of monitoring PFAS levels in drinking water, as participants living in areas with detectable PFAS had higher levels in their blood compared to those in areas with undetectable levels. Efforts to evaluate and address PFAS contamination in drinking water supplies are crucial to safeguarding public health.
In addition to studying PFAS in the food chain, the researchers emphasized the need for further research on indoor exposures and newer, non-legacy PFAS compounds. Upholding federal drinking water standards and restricting the use of PFAS, including emerging variants, are essential steps in reducing their presence in the environment. Consumers can also make informed choices by opting for products labeled “fluoro-free” whenever possible.
Overall, the study provides valuable insights into the ongoing exposure of adults to PFAS through food and drinking water, highlighting the need for continued efforts to regulate and monitor these harmful chemicals to protect public health.
