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For decades scholars and public health officials have known that people with greater income or formal education tend to live longer and enjoy better health than their counterparts who have less money or schooling. The trend holds true wherever researchers look--in poor countries or rich ones, in Europe, Asia or the Americas--but two notable exceptions stand out.

Very obese older men hoping to live longer may be let down by a new long-term study that found weight-loss surgery didn't increase survival for people like them — at least during the first seven years.

Even in your elder years, eating healthy foods can help you live longer, a new study suggests.