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A new study suggests the Sardinian village of Bolotana may be a new ‘blue zone’ for longevity. Women who reach age 70 there are nearly four times as likely to live to 100 compared to women in the United States. Researchers validated these findings using centuries-old municipal and church records.
A Sardinian village named Bolotana may represent a newly identified blue zone, an area where residents live unusually long lives, according to a new study published in Frontiers in Aging. Researchers found that women in Bolotana who reach age 70 are nearly four times as likely to survive to age 100 compared to women in the United States. The findings, co-authored by epidemiologist S. Jay Olshansky, suggest the community offers a rare opportunity to study the factors behind exceptional longevity in a population with exceptionally reliable historical records.
The study examined demographic records from Bolotana, a village of approximately 2,300 residents in the mountains of Sardinia. Researchers estimated that 13.8% of women in the village who reach age 70 will live to 100. This contrasts sharply with 3.5% for women in Italy and 3.6% for women in the United States. The analysis relied on municipal and baptismal records dating back centuries, allowing researchers to independently verify ages at birth and death. Olshansky noted that this rigorous documentation eliminates ambiguity regarding the ages of centenarians.
Bolotana first drew attention due to an unusual concentration of centenarians. In 2024, six people aged 100 or older were living in the village, a prevalence roughly 11 times higher than that of the United States. The research team reconstructed life histories for residents born between 1900 and 1925, documenting 38 centenarians among 3,060 people. This data supports the hypothesis that Bolotana meets the criteria for a blue zone, defined by communities where residents routinely outlive those in surrounding regions.
Implications for Global Aging Research
The identification of Bolotana as a potential blue zone is significant because it challenges previous assumptions about gender-specific longevity patterns in Sardinia. While the island’s original blue zone is known for high male longevity, Bolotana stands out for its female longevity. Olshansky stated, “We think this is the longest-lived female population in the world, or close to it.” This distinction matters because it suggests that different environmental or social factors may influence longevity in men versus women, even within the same geographic region.
Furthermore, the study addresses recent criticisms that reports of extreme longevity are often driven by inaccurate records. By using multiple independent sources such as church archives and civil records, the researchers provided a level of validation that is rare in demographic studies. If the characteristics behind this longevity can be identified and adopted more broadly, Olshansky noted, “the rest of the world can benefit from understanding the values practiced by these communities.”
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Sardinia’s Existing Longevity Reputation
Sardinia has long been a focal point for aging researchers. The island’s original blue zone, identified more than two decades ago, is renowned for the unusually high longevity of men. In most of the world, women live longer than men, but in the earlier identified Sardinian blue zones, this gap was narrower or reversed. Bolotana presents a different pattern, where female residents emerged as the standout group. Olshansky explained, “Females almost always live longer than males anywhere in the world, but in Sardinia that wasn’t the case. It’s one of the things that made it so unusual.”
The concept of blue zones originated from studies of communities where residents routinely outlive people in surrounding regions. Other confirmed blue zones include Okinawa, Japan, and the Nicoya Peninsula in Costa Rica. To evaluate Bolotana, researchers assessed two key measures: life expectancy at age 70 and the likelihood that someone who reaches age 70 will survive to age 100. Among international benchmarks, Bolotana women ranked second only to Hong Kong in both metrics.
“What makes Bolotana extraordinary is that it has an incredible historical record that allows us to definitively evaluate ages at birth and death.”
— S. Jay Olshansky, professor emeritus of epidemiology at the University of Illinois Chicago
Unknown Drivers of Exceptional Lifespan
While the study confirms that exceptional longevity exists in Bolotana, it does not explain why. Researchers have identified several clues, including a walkable community, locally produced food rich in healthy fats, and strong social bonds, but these factors have not been definitively proven as the primary causes. Olshansky noted that diet, physical activity, family support, social connection, and genetics likely all contribute, but the specific weight of each factor remains unclear.
Additionally, it is not yet known whether the longevity observed in women born between 1900 and 1925 will persist in younger generations. Changes in modern lifestyle, diet, and healthcare could alter these patterns. Further longitudinal studies are needed to determine if the blue zone status is a stable demographic feature or a historical anomaly tied to specific environmental conditions of the past century.
Future Studies on Lifestyle and Genetics
Researchers plan to conduct deeper analyses of the specific lifestyle factors in Bolotana to isolate their impact on longevity. This may include detailed studies of dietary habits, physical activity levels, and social structures. Genetic studies may also be undertaken to determine if there is a heritable component to the exceptional survival rates observed in the village.
The broader goal is to identify characteristics that can be adopted globally. If researchers can pinpoint the key drivers of longevity in Bolotana, public health officials may be able to recommend similar lifestyle changes to other populations. Olshansky emphasized that understanding these values could help people worldwide improve their own healthspan and lifespan.
Key Questions
What is a blue zone?
A blue zone is a community where people live unusually long lives, often exceeding the life expectancy of surrounding regions. Examples include Okinawa, Japan, and the Nicoya Peninsula in Costa Rica.
How did researchers verify the ages of centenarians in Bolotana?
Researchers used municipal and baptismal records dating back centuries. They matched birth, death, and church archives to independently validate ages, ensuring there was no ambiguity regarding the longevity of residents.
Is Bolotana the only place in Sardinia with high longevity?
No. Sardinia already has a known blue zone famous for male longevity. Bolotana is distinct because it shows exceptional longevity primarily among women, a pattern not seen in the other Sardinian blue zones.
What lifestyle factors are suspected to contribute to longevity in Bolotana?
Researchers point to a walkable community with steep streets, locally produced food including olive oil, and strong family and social bonds. These factors, along with potential genetic influences, are believed to contribute to the high survival rates.
Source: rss
