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The number of centenarians around the world rose from 151,000 in 2000 to 573,000 in 2021. People are living longer, and we can expect to see more people reach 100 in the years to come.
Centenarians exemplify successful ageing, often experiencing fewer chronic diseases and maintaining independence in daily life well into their 90s.
While genetics contribute to longevity, modifiable factors account for more than 60% of successful aging.
But what sort of factors specifically contribute to living to 100?
To find out, we reviewed lifestyle and health habits of centenarians and near-centenarians (those aged 95–99) worldwide.
Our recent review included 34 observational studies published since 2000. Here are four key factors we found contribute to extreme longevity.