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YONKERS, N.Y. -- As a prudent measure, Consumer Reports is cautioning pregnant women to avoid canned tuna. The magazine's advice is based on an analysis of Food and Drug Administration (FDA) tests of mercury in fish posted recently on the agency's Web site.
CR's analysis of government data showed that six percent of the tested samples of canned light tuna, long recommended as the safer choice over white tuna (also known as albacore) because of its presumably lower mercury content, contained at least as much or more of that potentially harmful heavy metal as white tuna. One possible explanation is that some canned light tuna may contain yellowfin, which tends …