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What is life expectancy?
Life expectancy is the average number of years a person is expected to live. In the story, the sharp fall in male life expectancy in Okinawa after 1945 clearly demonstrates how significant changes in diet can have a profound and measurable impact on a population's overall health and lifespan, according to researchers.
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Okinawa's centenarian diet linked to sweet potato, but diet shiftedRelated explainers
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