Harvard Toenail Study Shows No Heart Risk From Mercury in Fish

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The heart benefits from eating most fish outweigh the potential risks of ingesting mercury found in the seafood, according to a Harvard study of people’s toenail clippings.

Higher mercury exposure didn’t boost the incidence of coronary heart disease, stroke or cardiovascular disease, according to a study from Harvard Medical School, in Boston. The report, published yesterday in the New England Journal of Medicine, analyzed toenails because they are an indicator of the body’s absorption of mercury over the years, researchers wrote.