Can put a strain on the nervous system: Children should not eat this type of fish. Pregnant women should avoid tuna - mercury is to blame.
Problems caused by excessive mercury intake range from speech disorders, impaired memory and motor problems. Experts recommend salmon, mackerel or herring instead of the popular fish. The mercury is deposited at depths of 50 meters below the ocean surface. Predatory fish such as tuna ingest mercury when they eat contaminated animals, and the heavy metal then settles in the muscles.