The Secret of a Village Where People Thrive Beyond 100 Years Old: The Science of Longevity in Cilento, Southern Italy

Along the coast of southern Italy, there is a region attracting the attention of aging researchers worldwide: the Cilento area in the southern part of Campania. Olive groves, stone-built villages on hills, and small towns overlooking the sea. While it may not be as famous as the Amalfi Coast as a tourist destination, it holds special significance in the study of healthy longevity.

In this region, many people live relatively healthy lives even beyond the age of 100. Researchers do not view them as mere "rare examples of longevity" but as a group that holds clues for humans to live longer and healthier lives. At the center of this is the Cilento Initiative on Aging Outcomes, commonly known as the CIAO study.

On May 22, 2026, the 11th Annual CIAO Longevity Symposium was held at the Sanford Burnham Prebys Medical Discovery Institute in San Diego, USA. Scientists and physicians from Europe and the United States gathered to report new insights gained from the centenarians of the Cilento region.

The intriguing aspect of this research is that it does not attempt to provide a simple answer to the straightforward question, "What is the secret to longevity?" Mediterranean diet, regular physical activity, low-stress living, social connections, and adequate sleep—these lifestyle habits are, of course, important. However, the CIAO study aims to delve into the cellular-level changes behind these habits. How is DNA damage repaired? How is inflammation suppressed? Is metabolism maintained at a younger age than the actual age? What are the characteristics of proteins, hormones, and gene expression in the blood?

In other words, the centenarians of Cilento cannot be explained by simply "eating well, walking well, sleeping well, and connecting with people." There may be multiple mechanisms at work within their bodies that delay aging.

The CIAO study is an international project that has been ongoing since 2015. It targets elderly individuals aged 95 and older living in the Cilento region and a control group aged 60 to 75. Data such as blood samples, clinical history, dietary habits, psychosocial evaluations, and cognitive function tests are collected from participants. Furthermore, the blood is sent to research institutions in the United States for detailed analysis using modern life science technologies, including metabolomics, proteomics, genome analysis, epigenome analysis, and measurements of cytokines and biomarkers.

One of the fundamental issues highlighted at this symposium was "What is aging?" Aging is not merely the accumulation of years but the accumulation of various damages occurring in cells and tissues. DNA damage, telomere shortening, epigenetic changes, mitochondrial dysfunction, chronic inflammation, disruption of gut microbiota, and stem cell exhaustion. These aging characteristics intricately intertwine, leading to a decline in physical function and an increased risk of disease.

One of the molecules that garnered attention was SIRT6. SIRT6 is an enzyme involved in DNA repair, inflammation, and metabolic pathway regulation, and its association with longevity has been suggested. It is believed that species with longer lifespans tend to have higher DNA repair capabilities, and SIRT6 may play a role in this difference. If the cells of centenarians can respond more efficiently to DNA damage, it might be called an "internal maintenance ability that delays aging."

Additionally, DNA methylation was also highlighted as an important theme. DNA methylation is like a chemical mark that changes how genes work without altering the DNA sequence itself. In recent years, the "epigenetic clock," which estimates biological age from DNA methylation patterns, has gained attention. Even if the chronological age is the same, the rate of aging within the body varies from person to person. The centenarians of Cilento may be maintaining youthfulness in terms of this biological age.

Lifestyle data is also intriguing. At the symposium, differences in blood pressure, weight, BMI, smoking, drinking, sleep, and cholesterol between the centenarian group and the control group were presented. Centenarians tended to have lower blood pressure, weight, and BMI, with many having no history of smoking and not drinking alcohol. Furthermore, many slept more than five hours a day. Total cholesterol levels were also lower than those of the control group.

What is important here is not to simplistically conclude, "If you imitate this, you can live healthily until 100." The CIAO study is an observational study and does not definitively establish causality. The people living long and healthy lives in Cilento are in their current state as a result of multiple factors, including genetics, diet, exercise, environment, socio-cultural aspects, medical access, and psychological traits. Therefore, researchers are trying to look at the entire lifestyle and molecular changes within the body, rather than focusing on a single factor.

Metabolic research is also a major pillar. By analyzing small molecules in the blood, or metabolites, insights into how a person's body uses energy, processes nutrients, and responds to aging can be gained. According to reports, significant differences were found in about 10% of the approximately 30,000 metabolites measured in centenarians. Some were elevated, while others were decreased. This suggests the possibility of viewing "metabolic age" separately from chronological age.

Even at the same age of 80, some people may function like they are 70 inside their bodies, while others may be aging like they are 90. If centenarians show a younger metabolic profile than their actual age, it could potentially be applied as a new indicator for measuring healthy lifespan.

From proteomics, which examines proteins in the blood, pathways related to fibrosis emerged. The gene SERPINE1, in particular, is drawing attention. SERPINE1 is a gene that produces proteins involved in blood coagulation and cellular aging, and its association with lifespan and the risk of liver fibrosis has been suggested. Considering the phenomenon where organs harden and lose function with aging, how to suppress fibrosis becomes an important theme for healthy longevity.

Furthermore, the enzyme PAM also became a topic of discussion. PAM is involved in the process of activating peptide hormones and neuropeptides, and it relates to many physiological functions such as metabolism, digestion, nerve function, emotions, growth, and aging. There may be characteristics in the activity of PAM and related hormone states in the residents of Cilento, which could become an indicator for longevity research in the future.

Another report suggested that the centenarians of Cilento might have fewer accumulations of single-point mutations or insertions/deletions in their genomes. Additionally, telomere shortening might be suppressed. Telomeres are structures that protect the ends of chromosomes and shorten with cell division. Shortening of telomeres is considered one of the indicators of cellular aging. If telomere wear is slower in centenarians, the aging speed of blood and immune cells might be more gradual.

On the other hand, animal experiments have also reported the possibility of interventions targeting senescent cells. Senescent cells are those that have stopped dividing but do not become completely harmless. Accumulating in the body can potentially cause chronic inflammation and a decline in tissue function. The current report introduced experiments with MDM2 inhibitors in aged mice, suggesting the possibility of liver rejuvenation, frailty suppression, and lifespan extension. However, this is not yet applicable to humans as it stands. In longevity research, it is necessary to hold both expectations and caution simultaneously.

The appeal of the CIAO study is that it not only focuses on the latest molecular biology but also looks at the human aspect of aging. Past research has shown that the elderly over 90 in Cilento tend to have higher mental well-being despite being physically less healthy than younger generations. The ability to accept and overcome adversity, a positive attitude, strong connections with family and land, and a sense of purpose in life. These psychosocial elements are also treated as part of healthy longevity.

This teaches us the limitations of considering longevity solely as a "disease-free body." People do not live by cells alone. Who do you share your meals with? How much do you walk every day? Can you feel your role? Are you not lonely? Are you able to sleep? These small daily conditions may be linked to the state of inflammation, hormones, metabolism, and immunity.

Looking at reactions on social media, the 2026 release is not yet widely disseminated to the general public, possibly due to its recent release. However, there is interest among researchers and those in the medical and biotech fields. Salvatore Di Somma, a co-researcher of the CIAO study, posted on LinkedIn about the meeting in San Diego, describing it as a fantastic opportunity to update the latest findings. This post received reactions and comments, with praise in Italian such as "very interesting" confirmed in the comments section.

Additionally, past CIAO study introduction posts by Sanford Burnham Prebys emphasized interest not only in "living longer" but also in "aging healthier." The point of reception on social media for this theme seems to be a focus on interest in healthy lifespan that can be incorporated into daily life, rather than mere expectations of immortality. Words like Mediterranean diet, physical activity, emotional resilience, and social connections are more accessible to general readers than specialized molecular mechanisms.

On the other hand, skeptical views may emerge on social media in the future. Reactions like "Stories of longevity villages have been around for a long time," "Can it be explained by diet alone?" "Isn't genetics a major influence?" and "Is it a health method only the wealthy can practice?" Such questions are rather healthy. The value of the CIAO study lies in its attempt to verify the longevity villages, which have been spoken of in legends and anecdotes, using standardized clinical information and molecular analysis.

In recent years, the longevity business has been rapidly expanding. Supplements, fasting methods, biohacking, blood tests, aging clocks, rejuvenation treatments. On social media, simplified information like "Drink this to rejuvenate" or "This habit extends lifespan" tends to spread easily. However, what the CIAO study indicates is rather the opposite message. Healthy longevity is not determined by a single magical ingredient. It is a complex system where diet, sleep, exercise, human relationships, inflammation control, DNA repair, metabolism, hormones, vascular function, and cognitive function overlap.

Therefore, there is much to learn from the centenarians of Cilento. They are not ideal models created in a laboratory. They are people who have lived in real regions, within actual families, food cultures, and landscapes. Walking on slopes, eating local ingredients, meeting people, and living according to the seasons. Within this reality, signs of healthy longevity measurable at the molecular level are hidden.

The focus going forward is how these insights can be applied to the health of the general public. It is not necessary to move to Cilento to age healthily. What is important is to extract common elements among centenarians and transform them into forms that can be practiced even in urban life and aging societies. For example, anti-inflammatory diets, systems to reduce social isolation, sleep improvement, urban planning that incorporates physical activity into daily life, and the development of biomarkers to measure aging risk can be considered.

For Japan, which is also facing an aging population, this research is rich in implications. Japan is one of the world's leading longevity countries, but the challenge is shifting from "how long to live" to "how to live independently and healthily in mind and body." Medical expenses, caregiving, labor shortages, loneliness, dementia. To address these issues, it is necessary to not only rely on medical care that treats diseases after they occur but also to understand the progression of aging itself and extend the healthy period.

The centenarians of Cilento may hold hints for future medicine. However, it is not a "rejuvenation elixir." What they teach us is that the body's internal repair capabilities and the human relationships and culture outside of living are inseparably connected.

The science of longevity requires both a microscope to view cells and a perspective to view life. The CIAO study is precisely chasing that intersection.

Sources and References

Newswise. Used to confirm the overview, research subjects, and main presentations of the 11th CIAO Longevity Symposium.
https://www.newswise.com/articles/ciao-study-11th-annual-longevity-symposium-provides-new-peeks-and-possibilities-at-longer-healthier-lives/?sc=rsmn

Sanford Burnham Prebys official release. Used to confirm research structure, participant cohorts, presentation content, and SNS sharing pathways.
https://sbpdiscovery.org/press/ciao-study-11th-annual-longevity-symposium-provides-new-peeks-and-possibilities-at-longer-healthier-lives/

EurekAlert version. Used to confirm the presenting institution, tags, original information, and media information.
https://www.eurekalert.org/news-releases/1131351

ScienceDaily 2025 related article. Used to organize the 10-year background, research objectives, and past research results of the CIAO study.
https://www.sciencedaily.com/releases/2025/05/250505171023.htm

SciTechDaily related explanatory article. Used to confirm past explanations of biological age, inflammation, and microcirculation regarding the centenarians of Cilento.
https://scitechdaily.com/the-secret-to-living-past-100-scientists-say-it-could-be-hidden-in-this-small-italian-village/

Salvatore Di Somma's LinkedIn post. Used to confirm public SNS reactions regarding the symposium.
https://www.linkedin.com/posts/salvatore-di-somma-1716623b_fantastic-meeting-in-san-diego-at-sanford-activity-7465416490750668800-7knI

Sanford Burnham Prebys's LinkedIn post. Used to confirm past introductions and reaction trends on SNS regarding the CIAO study.
https://www.linkedin.com/posts/sbpdiscovery_ciao-study-lessons-learned-on-living-longer-activity-7335743841393606657-iEbx