A new study from researchers at the University of Dartmouth in the United States warns seafood enthusiasts of the potential health risks associated with consuming high levels of ‘forever’ chemicals, specifically PFAS (perfluoroalkyl and polyfluoroalkyl substances). These man-made toxins, known for their persistence in the environment and the human body, have been found in alarming concentrations in popular seafood choices, particularly shrimp and lobster.

PFAS: A Hidden Danger in Seafood

PFAS chemicals, originating from sources like packaging, clothing, and fire-fighting foams, have been detected in various water sources and are present in the bloodstream of nearly all Americans. Excessive exposure to PFAS can lead to serious health issues, including cancer, liver disorders, and developmental problems in fetuses. The recent study highlights that the levels of PFAS in seafood may have been previously underestimated, raising concerns about the safety of fish-heavy diets.

The study, published in the journal Exposure and Health, revealed that shrimp and lobster contain the highest concentrations of PFAS among the seafood tested. Average concentrations reached up to 1.74 and 3.30 nanograms per gram of flesh, respectively. Researchers speculate that the bottom-dwelling nature of these species might contribute to their higher PFAS levels, though the exact reasons remain unclear.

Balancing Benefits and Risks

Despite the findings, the research team advises against completely eliminating seafood from diets. Seafood remains a valuable source of lean protein and omega fatty acids. Professor Megan Romano, the study’s corresponding author, emphasizes the importance of understanding the risk-benefit trade-off of seafood consumption, especially for vulnerable populations like pregnant individuals and children.

Co-author Professor Celia Chan points out that while guidelines exist for contaminants like mercury in seafood, there are no established limits for PFAS. Professor Kathryn Crawford, the study’s first author, reassures that most people can still enjoy seafood benefits without excessive PFAS risk, as long as their diet is balanced and includes moderate amounts of fish.