Are PFAS from fish and shellfish stacking with coastal water exposure?

What's actually in it

PFAS (per- and polyfluoroalkyl substances) are a group of man-made chemicals that do not break down in the environment or your body. They are often called forever chemicals because they build up over time. You are likely being exposed to these chemicals through multiple routes at once.

When you eat fish or shellfish, you are consuming PFAS that have accumulated in their muscle tissue, as shown in a 2026 study in Mar Pollut Bull. At the same time, if your local drinking water is contaminated, you are adding to that total exposure. Research shows that these sources stack, increasing the amount of PFAS circulating in your blood.

What the research says

A 2026 study in Chemosphere confirms that eating fish and shellfish is a direct path for PFAS to enter the U.S. population. This is not an isolated issue. A 2026 study in Environ Pollut found PFAS pollution in both fish and water samples across the United Kingdom and Spain, proving that these chemicals are widespread in coastal and freshwater environments.

The danger is that these exposures are not independent. A 2026 study in Environ Health Prev Med tracked high serum levels in people exposed through drinking water, while a 2026 study in Environ Res linked water contamination to serious health risks like liver cancer mortality. When you combine dietary intake from seafood with contaminated water, you are creating a cumulative effect that keeps your body's levels high.