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WASHINGTON -- Pregnant and lactating women should exclude shark, swordfish, king mackerel, and tilefish from their diets, the Food and Drug Administration said in a warning issued last month.
The warning also applies to women of childbearing age who might become pregnant.
These types of fish contain a high level of methyl mercury the form of mercury that can be harmful to the developing fetal nervous system. Because these fish feed on smaller fish, they contain the highest levels of methyl mercury "and therefore pose the greatest risk to the unborn child," the FDA said in a statement.
In the statement, the FDA advised women to eat other types of fish instead, such as shellfish, canned fish, smaller ocean fish, and farm-raised fish. Women can "safely" eat an average of 12 ounces of cooked fish per week, the statement said. A typical serving of fish is about 3-6 ounces.
The Center for Science in the Public Interest, a Washington-based consumer advocacy organization, has said that the FDA warning should apply to tuna as well. Tuna in the form of steaks or sushi can contain methyl mercury levels that exceed the action level set by the FDA, said Caroline Smith DeWaal, director of food safety at ...