A study released Thurday by environmental groups reports that store-bought swordfish contains mercury levels that are above the legal limit.
Researchers found elevated concentrations of the element in 24 swordfish samples received from a group of supermarket chains that included Safeway, Shaws, Albertson’s and Whole Foods.
A supermarket industry group says it is not surprised by the survey.
They say swordfish and tuna are known to have higher levels of mercury.
Traces of mercury are found in nearly all fish and shellfish.
Elevated mercury levels have been linked to learning disabilities and developmental delays in children as well as heart and kidney damage in adults.
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