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A study using validated records found that women in Bolotana, a Sardinian village outside the island’s established blue zone, had unusually high estimated survival from age 70 to 100 during 2021–2025. The researchers describe the village as a possible longevity hotspot, not a confirmed blue zone; estimates varied across time periods, and the comparisons were descriptive rather than formal statistical tests.
Women aged 70 and older in Bolotana, Sardinia, had much higher estimated survival to age 100 than women in regional and national comparison populations during 2021–2025, according to a study in Frontiers in Aging. The researchers say the mountain village may be a candidate longevity hotspot, but the findings do not establish it as a new blue zone.
The study estimated that a woman who had reached age 70 in Bolotana had a 13.83% chance of surviving to 100 under the researchers’ life-table analysis. The comparable estimates were 4.33% for Nuoro Province, 4.43% for Sardinia and 3.54% for Italy. The study reported Bolotana’s estimate as more than three times the comparison figures.
Estimated remaining life expectancy for Bolotana women at age 70 was 20.85 years, compared with 18.61 years in Nuoro Province, 18.40 in Sardinia and 18.06 nationally. These are population estimates, not predictions about any particular individual. The researchers compared the figures descriptively and did not carry out formal statistical tests of differences between the populations.
For the analysis of residents aged 70 and older, researchers counted 3,138 person-years of observation and 149 deaths from 2021 through 2025. Bolotana’s average population during that period was 2,266. The team also calculated a cohort-based Extreme Longevity Index for 3,060 people born in the village from 1900 to 1925, including people who later moved away.
Why Bolotana’s Survival Estimates Matter
The results draw attention to possible late-life survival outside Sardinia’s established blue zone, a region historically identified across 14 mountain municipalities in Nuoro and Ogliastra. If other communities show similarly strong survival in validated records, researchers may need to widen the geographical picture of exceptional longevity.
However, the figures do not explain why Bolotana women may have survived at higher rates during the study period. The analysis describes an observed demographic pattern; it does not demonstrate that a particular diet, lifestyle, social structure or local practice caused it. That distinction matters for readers because longevity claims can travel well beyond what a small, local study can establish.
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Bolotana Outside Sardinia’s Historic Zone
Bolotana is a small mountain community in central Sardinia, around 110 kilometers from the original Sardinian blue zone. Blue zones are geographically defined areas associated with unusually favorable survival at older ages and a comparatively high number of people living to 100 or beyond.
To address concerns that reported ages can be inaccurate, the team cross-checked civil records against historical church baptism and burial records. Every identified centenarian had civil birth documentation, and researchers independently checked 97% of recorded centenarian deaths against parish archives. The study was carried out by researchers from Sardinian institutions and universities in the United States. The authors disclosed that coauthor Dan Buettner owns Blue Zones, Inc., and that S. Jay Olshansky received consulting compensation related to a proposed Blue Zone Research Institute.
“Bolotana is a promising blue-zone candidate rather than an established longevity hotspot.”
— The study authors
Limits of the Longevity Evidence
The estimated advantage changed substantially in the study’s sensitivity analyses using different calendar periods, including 2020–2025 and 2015–2019. That variation means the 2021–2025 result may not represent a stable, long-term pattern. The source report does not provide all the alternative-period estimates, so the size and direction of those changes cannot be stated here.
The comparisons were descriptive, and the study did not formally test whether Bolotana’s estimates differed statistically from the regional or national figures. The analysis also focused on a small community and a recent five-year period. It remains unclear whether the unusually high estimate will persist, what factors may account for it, or whether comparable patterns occur in other villages beyond known longevity regions.
Further Records and Longer Follow-Up
The next step is to test whether Bolotana’s late-life survival pattern holds across additional years and under further demographic scrutiny. Longer follow-up could show whether the 2021–2025 estimates reflect a lasting local advantage or a result sensitive to the period analyzed. The study itself does not announce a formal designation or a specific follow-up timetable.
Researchers could also examine other communities using similarly validated civil and parish records. Until that work clarifies the pattern, Bolotana is best described as a candidate for further study, rather than a newly established blue zone.
Key Questions
Where is Bolotana?
Bolotana is a small mountain village in central Sardinia, about 110 kilometers from the island’s historically identified blue zone.
What did the study find about women’s survival?
For 2021–2025, the study estimated that 13.83% of women reaching age 70 in Bolotana would survive to age 100. The comparable estimates were 4.33% in Nuoro Province, 4.43% in Sardinia and 3.54% across Italy.
Has Bolotana been confirmed as a blue zone?
No. The researchers present it as a promising candidate. They note that the estimated advantage varied across calendar periods and that the population comparisons were descriptive.
How did researchers check ages in the records?
The team cross-checked civil records with historical parish baptism and burial records. Every identified centenarian had civil birth documentation, and 97% of recorded centenarian deaths were independently checked against parish archives.
Does the study explain why women in Bolotana may live longer?
No. The study reports a survival pattern but does not establish its cause. It does not show that a specific local lifestyle or behavior produced the estimates.
Source: news-medical.net
