Sardinian Village Bolotana Emerges as a New Longevity Hotspot for Women

High in the mountains of the Italian island of Sardinia, a terracotta-tiled village of roughly 2,300 residents is drawing the attention of scientists who study the limits of human lifespan. A new study co-authored by S. Jay Olshansky, professor emeritus of epidemiology at the University of Illinois Chicago School of Public Health, and published in the journal Frontiers in Aging, reports that women in the village of Bolotana are nearly three times as likely to reach age 100, once they have survived to age 70, as women in the United States. The findings suggest that Bolotana could represent a newly identified blue zone, a term used to describe geographic areas where people live unusually long lives. The research was supported by National Geographic and carried out by an international team of investigators who combed through centuries of local records to reconstruct the survival histories of the village’s residents.

The numbers at the heart of the study are striking. Researchers estimated that 13.8 percent of women in Bolotana who reach age 70 will go on to live to 100. By comparison, approximately 3.5 percent of women in Italy and 3.6 percent of women in the United States who reach 70 survive to their hundredth birthday. That gap, nearly a fourfold difference relative to two wealthy industrialized benchmarks, is precisely the kind of signal that longevity researchers look for when evaluating whether a community deserves blue zone status. The concept originated from studies of communities where residents routinely outlive people in surrounding regions, and other blue zones confirmed by researchers include Okinawa in Japan and the Nicoya peninsula in Costa Rica.

To evaluate whether Bolotana meets that standard, the team assessed two key demographic measures: life expectancy at age 70 and the probability that a person who reaches age 70 will survive to age 100. Bolotana first attracted attention because of its unusual concentration of centenarians. In 2024, six people aged 100 or older were living in the village, a prevalence the researchers estimate to be roughly 11 times higher than that of the United States. The team then conducted a deeper analysis using civil records and church archives to reconstruct the life histories of residents across more than a century, documenting 38 centenarians among 3,060 people born in Bolotana between 1900 and 1925.

What sets this study apart from many previous claims of exceptional longevity is the rigor of its age validation, a persistent problem in a field where inflated or mistaken ages have repeatedly undermined celebrated cases. The researchers matched birth, death and baptismal records to independently verify the ages of centenarians, drawing on municipal and baptismal records that date back centuries. Olshansky emphasized that the historical record in Bolotana allows ages at birth and death to be definitively evaluated. Every person in the cohort who lived past 100 could be validated through these documents, leaving no ambiguity about whether the reported ages are genuine. That level of documentary certainty is rare and gives the findings unusual weight.

The results are also notable because they complicate an established narrative about Sardinian longevity. The island’s original blue zone, identified more than two decades ago, is famous for unusually high male longevity, a pattern that has long puzzled demographers since females almost always outlive males everywhere else in the world. In Bolotana, however, women emerged as the standout group. Female residents who reached age 70 were estimated to have nearly 21 years of additional life expectancy. Among international longevity benchmarks, Bolotana women ranked second only to Hong Kong in both life expectancy at age 70 and the probability of surviving to age 100. Olshansky suggested that this may be the longest-lived female population in the world, or close to it.

The timing of the study matters as well. In recent years, some critics have argued that many reports of extreme longevity around the world are artifacts of inaccurate records, pension fraud, or sloppy demographic data rather than genuine biology. Those critiques have cast doubt on several celebrated longevity claims and have made rigorous validation the central test for any new blue zone candidate. Bolotana’s extensive municipal and church archives allowed the researchers to validate ages through multiple independent sources, directly addressing the most common objection raised against longevity hotspots. In effect, the village offers a natural experiment in which the demographic signal of exceptional survival can be separated from the noise of unreliable record-keeping.

While the study confirms that something unusual is happening in Bolotana, it does not explain why. The village does, however, offer several clues that the researchers consider worth further investigation. Residents live in a highly walkable community built on steep streets and hills, so everyday movement is largely done by walking rather than driving. Most food is grown locally, including olive oil rich in healthy fats, a dietary staple long associated with Mediterranean patterns of eating. Families often live close together, and social isolation appears to be rare. Olshansky described a close-knit community in which people take care of one another, a social texture that gerontologists increasingly view as a meaningful contributor to healthy aging rather than a mere backdrop to it.

Researchers believe that factors such as diet, physical activity, family support, social connection and genetics likely all contribute to the village’s remarkable survival statistics. Disentangling those threads is the next scientific challenge. Genetic contributions to longevity are well documented in Sardinia, where historical isolation has produced distinctive population structure, but lifestyle and social factors are also plausible drivers of late-life survival. The study’s demographic methods, which focus on survival conditional on reaching age 70, are designed to capture the combined effect of all such influences on the oldest segment of the population, and they provide a template that other communities hoping to substantiate longevity claims can follow.

For Olshansky, the broader significance of the work extends well beyond a single Sardinian village. If researchers can identify the characteristics behind this longevity and help people elsewhere adopt them, he argues, the rest of the world can benefit from understanding the values practiced by these communities. The finding that a small mountain village can nearly quadruple the odds that a 70-year-old woman becomes a centenarian, relative to the United States, is a vivid reminder that lifespan is shaped not only by genes and medicine but by the design of towns, the food systems that feed them, and the social bonds that hold them together. As the search for the biology and sociology of exceptional aging continues, Bolotana now stands as one of the most compelling and best-documented natural laboratories on Earth.

Subject of Research: Exceptional late-life survival and centenarian prevalence in Bolotana, Sardinia, as a candidate new blue zone

Article Title: Sardinian village may be a new longevity hotspot, UIC research finds

Article References: Sardinian village may be a new longevity hotspot, UIC research finds. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: longevity, blue zones, Sardinia, Bolotana, centenarians, demography, age validation, life expectancy, epidemiology, healthy aging, Frontiers in Aging, women's longevity