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General view of mixed nuts including cashew, almonds, hazlenuts, walnuts, pecan nuts and pistachio nuts, as a handful of nuts a day can help to keep the doctor - and the undertaker - away, research has shown. (Photo by Victoria Jones/PA Images via Getty Images)

General view of mixed nuts including cashew, almonds, hazlenuts, walnuts, pecan nuts and pistachio nuts, as a handful of nuts a day can help to keep the doctor - and the undertaker - away, research has shown. (Photo by Victoria Jones/PA Images via Getty Images)