Which health outcome is associated with bioaccumulation of mercury in seafood for humans?

• A. Immediate lethality
• B. Increased risk of neurological effects
• C. No health impact
• D. Immunity to mercury

Answer: (B)

Mercury that makes its way into fish often becomes methylmercury, a form that tightly binds to proteins in fish tissue and accumulates as you move up the food chain. When people eat seafood with higher levels of methylmercury, it can cross into the bloodstream and reach the brain, where it disrupts nerve cell function. This is especially concerning for developing fetuses and young children, whose brains are forming, but can also cause neurotoxic effects in adults with higher exposure. So the health outcome most associated with this bioaccumulation is an increased risk of neurological effects.

Immedi­ate death is not the typical outcome from regular seafood consumption, and there is clear evidence of health impact rather than immunity or no effect, even if the risk is higher at lower doses over time or for sensitive groups.