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Do the health benefits of eating certain types of fish outweigh the risks from the chemical contaminants that fish can contain? Researchers systematically reviewed published studies of cardiovascular risk reductions associated with intake of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), two long-chain ω-3 polyunsaturated fatty acids (PUFAs) found in many fish. They also reviewed studies of neurologic- and cancer-risk increases associated with intake of the methylmercury, PCBs, and dioxins found in some fish. Large, prospective studies and randomized trials were included in the analysis, but the article does not make clear the precise number of studies.
Each 100 mg of EPA and DHA intake daily was associated with a 15% reduction …