Happiness key to well being

There is a `clear and compelling evidence` that happy people live longer and experience greater well being than their unhappy peers, a study says.

The findings, based on a review of 160 studies of human and animal subjects, are the most comprehensive so far of the evidence linking happiness to health outcomes.

University of Illinois professor emeritus of psychology Ed Diener analysed long-term studies of human subjects, experimental human and animal trials, the journal Applied Psychology: Health and Well-Being reports.

`We reviewed eight different types of studies,` Diener said. `And the general conclusion from each type of study is that your subjective well-being — that is, feeling positive about your life — contributes to both longevity and better health.`

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