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Selenium supplements 'do not reduce cancer risk'

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Taking supplements containing the mineral selenium do not reduce cancer risk, according to a Cochrane review by Italian researchers. 

They said that, although some people believed taking selenium could reduce risk of cancer, their review of 49 observational studies and six trials found no protective effect against non-melanoma skin cancer or prostate cancer.

In addition, the warned there was some indication that taking selenium over a long period of time could have toxic effects.

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