Greenland Sharks Contain Extremely High Levels of Urea in Their Tissues

This shark's flesh carries chemical levels toxic to humans.

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Traditional fermentation processes are required to reduce toxin levels before consumption.

Greenland shark tissues contain elevated concentrations of urea that help balance osmotic pressure in cold, deep environments but render the meat toxic if eaten fresh.

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💥 Impact (click to read)

The same chemical adaptation that stabilizes proteins in freezing water also produces severe neurological effects in humans without proper preparation.

This dual role of biochemical defense and environmental adaptation illustrates how extreme habitats shape physiology in ways that appear almost self-poisoning by human standards.

Source

National Geographic

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