Somewhere on the internet right now, someone is being told that the secret to a long life lies on a Greek island or in the Japanese archipelago.
The idea comes from the Blue Zones, five regions said to produce extraordinary numbers of healthy centenarians.
It is a genuinely appealing story.
It is also, as of the last two years, a genuinely contested one.
The honest version includes both the lifestyle patterns that made the Blue Zones famous and the serious scientific fight over whether the underlying data holds up.
TL;DR
- The five Blue Zones are Okinawa in Japan, Sardinia in Italy, Nicoya in Costa Rica, Ikaria in Greece, and Loma Linda in California, popularized by Dan Buettner around 2004.
- Their shared “Power 9” lifestyle emphasizes plant-heavy eating, natural movement, purpose, stress reduction, and social connection, and much of it is supported by broader research.
- Since 2024, demographer Saul Newman has argued the extreme longevity counts may reflect record errors and pension fraud, a claim the original researchers strongly dispute.
Data anchored to demographic analyses and the peer-reviewed longevity literature, including the debate led by Saul Newman of University College London.
| wdt_ID | wdt_created_by | wdt_created_at | wdt_last_edited_by | wdt_last_edited_at | Blue Zone | Location | Often-cited feature |
|---|---|---|---|---|---|---|---|
| 1 | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | Okinawa | Japan | Historically long-lived, strong sense of purpose (ikigai) and community (moai) |
| 2 | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | Sardinia | Italy | Unusually even ratio of male to female centenarians |
| 3 | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | Nicoya | Costa Rica | Reportedly lower mortality among elderly men |
| 4 | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | Ikaria | Greece | Reputation for very old populations |
| 5 | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | emmanuel-ashemiriogwa | 20/08/2026 10:04 PM | Loma Linda | California, USA | Seventh-day Adventist community, plant-based diet, no smoking |
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The appealing version
The term was coined around 2000 for Sardinia and was popularized from 2004 by National Geographic explorer Dan Buettner, who later expanded it into books and a 2023 Netflix series.
In each region, researchers reported that people lived well into their 100s, with lower rates of chronic disease.
The common thread, the “Power 9,” is a lifestyle of mostly plant-based eating, daily legumes, constant natural movement, a sense of purpose, stress reduction, and deep social ties.
Harvard summaries note that residents were reported to live 7 to 10 years longer than the average American. Importantly, the lifestyle habits themselves line up well with other health research.
The contested version
Here is where honesty demands a second act.
Demographer Saul Newman of University College London, who won a 2024 Ig Nobel Prize for the work, argues the extreme longevity claims may be artifacts of bad data.
His examples are pointed.
- In Nicoya, roughly 42% of alleged centenarians were found to have misreported their age as early as 2008.
- In Ikaria, the number of centenarians drawing pensions dropped by about 72% after a 2015 audit.
- In Okinawa, many records were destroyed in World War II, and the region today has among the highest obesity rates in Japan, which complicates the healthy-diet narrative.
Analyzing UN mortality data across 236 jurisdictions, Newman found that Blue Zone areas were often associated with low incomes, low literacy, and high crime.
The rebuttal
The original researchers are not backing down.
Scientists, including Austad, Pes, Willcox, and Poulain, called Newman’s work irresponsible, said the ages were meticulously validated, and published a peer-reviewed reply in The Gerontologist in December 2025.
A 2026 preprint proposing new, stricter criteria found that Sardinia, Okinawa, and Nicoya “cleared the bar” when they were first identified, though some appear to be losing their outlier status as they modernize.
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ELI5
Some places are famous for having many people who live past 100, and their healthy habits, like eating plant-based foods and staying close to friends, seem good for everyone.
But scientists are now arguing about whether the record-keeping in those places was accurate, so the “live to 100” claims are less certain than they sound.
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