The global seafood market is quietly carrying persistent ‘forever chemicals’ (PFAS) across oceans and borders, exposing seafood lovers worldwide to hidden health risks.
A recent study published in the journal ‘Science’ has revealed that the global seafood trade is acting as a massive delivery system for Per- and polyfluoroalkyl substances (PFAS), industrial pollutants that persist in the environment for decades.
PFAS contamination travels from oceans to plates
PFAS are highly resistant to environmental breakdown and have been linked to serious illnesses, including cancer and liver disease. Once released into the oceans, they are absorbed by plankton and algae at the base of the food chain. Small fish consume these organisms, and predatory species, commonly sold for human consumption, accumulate the toxins in their tissues and organs.
Researchers mapped PFAS movement in 212 fish species using computer models validated with laboratory tests. By combining this data with global trade records, the study tracked how contaminated seafood is exported from one country to another, demonstrating that the international fish trade effectively redistributes PFAS worldwide.
The findings challenge the assumption that seafood is safe in countries with clean waters. For instance, Italy imports just 11 percent of its fish from Sweden, yet this accounts for more than 35 percent of Italian PFAS exposure, highlighting how contaminated imports can affect populations far from the source.
The much essential global action
Experts warn that PFAS contamination is a transboundary problem requiring coordinated global action. Stronger international guidelines and tighter controls on seafood imports are necessary to reduce human exposure to these toxic substances.
Rep. Image credits: azerbaijan-stockers@freepik | Cropped by GBN
Global measures to phase out certain PFAS, such as perfluorooctanesulfonic acid (PFOS), have proven effective. Since 2009, efforts to eliminate PFOS have reduced its presence in marine fish by 72 percent, demonstrating that targeted policies can mitigate health risks.
With seafood being a major protein source in many regions, including the GCC, the study underscores the need for ongoing monitoring of imported fish, adoption of stricter safety standards, and collaboration between countries to address PFAS contamination at the source.
The research adds to growing evidence that while fish consumption provides essential nutrients, awareness of chemical pollutants in the seafood supply chain is critical for public health planning. International cooperation and regulatory frameworks remain key to ensuring that global fish trade does not continue to spread hazardous chemicals.
