Blue Zones

Blue Zones are regions where people are reported to live much longer than average. The idea grew out of demographic fieldwork in Sardinia by Pes and Poulain. Dan Buettner then made it famous through National Geographic and a project with the National Institute on Aging.

These regions are said to have far more people reaching 100 than typical Western countries. How exact those numbers are depends on how the data was verified, and we will get to that in a moment. The bigger point: residents do not just live longer. They also seem to stay healthier, with less chronic disease and less disability in old age.

One much-quoted finding is that only a small share of longevity is genetic, historically estimated at around 20 to 25 percent in older twin studies. Recent work revises this upward. A 2026 paper in Science (Shenhar et al.) set aside deaths from accidents and infections. It looked only at intrinsic lifespan, meaning how long the body itself lasts. By that measure, the heritable share comes out closer to 50 percent ^[11]. Either way, environment and daily habits still do a lot of the work. They are the part you can actually change. These communities did not get there through supplements or fancy medical care. They got there through how they live.

Researchers looked at what these very different regions share, then pulled out patterns anyone can copy. The overlap became the "Power 9," nine habits seen across the world's longest-lived groups.

One important caveat: some researchers question the numbers. Demographer Saul Newman at UCL won the 2024 Ig Nobel Prize in Demography for this work. He found that records of people over 110 often come from places that had no reliable birth registration back then. When US states introduced birth certificates, records of people that old dropped by 69 to 82 percent ^[2]. Government audits told a similar story. In Japan, the trigger was Sogen Kato, found in 2010 to have been dead for about 32 years while his family collected his pension. The nationwide audit of family registries that followed found about 234,000 people who would have been over 100 if still alive but whose deaths or whereabouts had never been recorded. Most were likely WWII-era missing persons rather than current pension fraud. Blue Zones, the company, says the separate 2010 proof-of-life checks of registered centenarians, which covered all 47 prefectures, found none missing in Okinawa. In Greece, a 2012 check found that at least 72 percent of the centenarians listed in the census were in fact dead, according to Newman ^[2].

Newman's main paper is still a preprint ^[2]: posted publicly, but not peer-reviewed by a journal. Its latest version is from November 2025, and as of September 2026 it has no journal version. Blue Zones researchers pushed back. Giovanni M. Pes, Luis Rosero-Bixby, Bradley and Craig Willcox and others signed a joint demographer statement in October 2024 (bluezones.com). Steven N. Austad and Pes then defended the demographic methods in a peer-reviewed reply in The Gerontologist on 17 December 2025 ^[3]. So the debate is still open, but only the Blue Zones side has made it through journal review so far. We ran our own count of the official population statistics in our Blue Zones case file. Either way, the underlying habits hold up well in research outside the Blue Zones framework: moving often, having a sense of purpose, eating mostly plants, and staying socially connected.

There are five Blue Zones in the world: Okinawa (Japan), Sardinia (Italy), the Nicoya Peninsula (Costa Rica), Ikaria (Greece), and Loma Linda (California). Each was identified for unusually high reported longevity, though several centenarian counts are now contested. What unites them is daily life built around movement, plants, purpose, and tight social ties.

Blue Zone	Country	Known for	Key figure	Data status
Okinawa	Japan	hara hachi bu, moai, ikigai	2020: women 16th, men 43rd of 47 prefectures [12]	Historic lead gone
Sardinia (Barbagia, Ogliastra)	Italy	shepherds walking 8+ km a day	about 1 male centenarian per 2 female, vs 1 per 4 elsewhere [1]	Partly questioned
Nicoya	Costa Rica	plan de vida, corn and beans	about 20% lower mortality in elderly men, 1990 to 2011 [9]	Fading in younger cohorts [10]
Ikaria	Greece	Mediterranean diet, naps	share of people over 90 well above the European average [8]	Counts contested
Loma Linda	USA	Adventist faith, vegetarian diet	California Adventists: men +7.3 years, women +4.4 years [4]	Best measured

1. Okinawa, Japan Okinawa was once home to some of the world's longest-lived women. That edge has faded since 2005. In Japan's 2020 life tables by prefecture (from the MHLW health ministry, published December 2022) ^[12]:

• Okinawan women slipped to 16th of 47 prefectures, out of the top 10 for the first time since Okinawa entered the tables in 1975.
• Okinawan men fell to 43rd, down from number 1 in 1985.

Older Okinawan women still lead Japan in remaining life expectancy at 65 and 75. That fits the idea that the advantage belongs to older generations. So when Blue Zones research talks about Okinawa, it describes the patterns of those generations. (Hong Kong is among the global leaders for female life expectancy, ranking first or second most years.) Okinawans follow "hara hachi bu," an old Confucian rule that means stop eating when you feel 80 percent full. They keep tight friend groups called "moai" (small, lifelong support circles, usually 5 people) and a clear reason to wake up they call "ikigai" (literally "reason for being"). Their traditional food leans heavily on sweet potatoes, soy, and vegetables, with very little meat.

2. Sardinia, Italy Sardinia has an unusually even number of male and female centenarians: around 1 man for every 2 women, versus 1 for every 4 in other populations studied. That ratio comes from a 2001 Sardinian genetics study in Human Heredity (Passarino et al.) ^[1]. The same study found no male genetic line that explained it. The Blue Zone itself is a handful of mountain villages in the Barbagia and Ogliastra areas. Newman's critique has also questioned how some Sardinian birth records were verified. Local shepherds walk more than 8 kilometres a day over rough land. They drink modest amounts of local Cannonau wine, which is high in antioxidants. Family and community sit at the centre of daily life.

3. Nicoya Peninsula, Costa Rica A survival follow-up of 16,300 older Costa Ricans from 1990 to 2011 found that elderly Nicoyan men died at about a 20 percent lower rate than other Costa Rican men ^[9]. That is a death rate ratio of 0.80: 80 deaths where you would otherwise expect 100. Nicoyan women showed no such edge. But the advantage is fading. A 2023 study in Demographic Research (Rosero-Bixby) tracked it by birth year ^[10]. Men born around 1905 had about a third lower adult mortality. Men born around 1945 had about 10 percent higher mortality. In younger generations the edge is disappearing. So Nicoya's record is real but historical, not a permanent world best. Nicoyans drink water that is naturally high in calcium and magnesium. They eat traditional corn and beans. They keep a strong "plan de vida" (Spanish for "life plan," their version of ikigai). Faith and family give them purpose and support.

4. Ikaria, Greece Buettner reports striking figures for Ikaria. Compared with Americans, Ikarians:

• reach age 90 about 2.5 times as often (per popular write-ups of his work)
• live roughly 8 to 10 years longer on average
• get about 20% less cancer
• have half the rate of heart disease
• have almost no dementia

These are popularised estimates, not one tightly controlled study. The underlying demographic data has also been contested (see Newman's critique and the Greek 2012 audit noted above). The Ikaria Study, a 2009 survey of 1,420 islanders published in 2011 in Cardiology Research and Practice (Panagiotakos et al.), found a much higher share of people over 90 than the European average. Most of its 187 residents over 80 reported daily physical activity, frequent socialising, midday naps and very low rates of depression ^[8]. Islanders eat a Mediterranean diet full of olive oil, vegetables, and legumes. They nap, live in close-knit villages, and take a loose attitude toward time.

5. Loma Linda, California Loma Linda is the best-known hub of Seventh-day Adventists, and most of the hard data comes from Adventist studies. The Adventist Health Study-1, published in 2001 in Archives of Internal Medicine (Fraser and Shavlik), followed about 34,000 Adventists across California. At age 30, Adventist men could expect to live about 7.3 years longer than other white Californians. Women could expect about 4.4 extra years ^[4]. Combinations of diet, exercise, body weight, past smoking and, in women, hormone replacement therapy (HRT) accounted for differences of up to 10 years. The follow-up study, AHS-2, enrolled people from 2002 onward. Its 2013 mortality results (JAMA Internal Medicine, Orlich et al.) report smaller effects for vegetarian versus non-vegetarian Adventists ^[5]. Loma Linda Adventists keep a Saturday Sabbath for rest. They do not smoke or drink. They eat a plant-based diet and put community and faith first. The takeaway: a Blue Zone can exist inside modern America.

A note on the data: Demographer Saul Newman (2024 Ig Nobel in Demography) argues that several Blue Zone longevity counts may reflect bad birth records or pension fraud ^[2]. Blue Zones researchers rebutted several of his claims, first in a joint demographer statement in October 2024, then in a peer-reviewed reply in The Gerontologist on 17 December 2025 ^[3]. The Power 9 habits still hold up. The raw centenarian counts are contested.

The Power 9 are nine lifestyle habits Dan Buettner found in all five Blue Zones: move naturally, have a sense of purpose, downshift from stress, stop eating at 80 percent full, eat mostly plants, drink wine in moderation, belong to a faith community, put family first, and keep the right social circle. Five very different regions, five very different cultures, and yet the same nine habits keep showing up:

1. Move Naturally Blue Zone residents do not "work out." They live in places that push them to move. They walk, garden, climb stairs, and do physical chores every day. It is low-grade, all-day activity rather than structured exercise.

2. Purpose (Why I Wake Up) Okinawans call it "ikigai." Nicoyans call it "plan de vida." Research suggests a clear sense of purpose is associated with living longer, for example in a 2019 study of US adults over 50 ^[14].

3. Downshift Chronic stress feeds chronic inflammation. Blue Zone people have daily rituals to shed it. Okinawans remember ancestors. Adventists pray. Ikarians nap. Sardinians do happy hour.

4. 80% Rule Okinawans say "hara hachi bu" before eating, a cue to stop at 80 percent full. The gap between "not hungry" and "stuffed" can decide whether you gain weight or lose it.

5. Plant Slant Beans (fava, black, soy, lentils) are the backbone of Blue Zone diets. Meat shows up rarely. Reports suggest only a few times a month, in small portions.

6. Wine @ 5 Blue Zone residents, except the Adventists, drink 1 to 2 glasses of wine a day, usually with food and friends. But a large 2023 meta-analysis in JAMA Network Open (Zhao, Stockwell et al.) suggests the apparent benefit of moderate drinking mostly fades once you correct for abstainer bias and other confounders (hidden factors that skew a comparison) ^[6]. Abstainer bias means the non-drinker group often includes people who quit because they were already sick. That makes drinkers look healthier by comparison. The real driver may be the social time, not the alcohol.

7. Belong Most centenarians studied belonged to a faith community. Some studies suggest regular attendance at religious services is associated with living longer, for example a large 2016 study of US nurses ^[15]. The social connection may matter as much as the faith itself.

8. Loved Ones First Blue Zone centenarians put family first. They keep aging parents close, stay committed to a partner, and invest time in their kids. Family gives support, purpose, and belonging.

9. Right Tribe The world's longest-lived people either chose or were born into social circles that reinforce healthy habits. Okinawans build "moai," small groups (traditionally 5, sometimes up to 7) of friends who commit to supporting each other for life. A 2010 meta-analysis of 148 studies linked stronger social ties with better survival ^[13].

Your moai in Germany, Austria and Switzerland: Germany has roughly 620,000 eingetragene Vereine (registered non-profit clubs), including Sportverein, Wanderverein, Chorverein, Schützenverein, and Gartenverein. Join one for 5+ years and you get a weekly, fixed social structure much like an Okinawan moai, often for 5 to 15 euros a month. Austria's Vereinsregister and Switzerland's strong club culture offer the same kind of infrastructure. A Stammtisch (a weekly pub meetup with the same fixed group of friends) is another quiet longevity lever most people in German-speaking countries have within walking distance.

The single most copyable Blue Zone rule: Eat half a cup of cooked beans, lentils, or chickpeas per day. That is one bowl of lentil soup (Linsensuppe), one scoop of chickpeas (Kichererbsen) on a salad, or 3 tablespoons of hummus. A 2004 cross-cultural study in the Asia Pacific Journal of Clinical Nutrition (Darmadi-Blackberry et al.) looked at 785 people aged 70+ in five cohorts across Japan, Sweden, Greece and Australia. Every extra 20 g of legumes a day went with roughly 7 to 8% lower mortality ^[7]. Cheapest action in the entire longevity field.

So what about wine? Current best guidance (the 2023 meta-analysis ^[6], plus the WHO in 2023): if you don't drink, don't start. If you do drink, the Blue Zone benefit probably comes from the social setting, not the alcohol. A Feierabendbier at a Biergarten with friends may carry most of the "wine @ 5" effect. The ritual and the company matter more than the drink.

The Blue Zone diet is roughly 95 percent plants: vegetables, legumes, whole grains, nuts, and fruit, with beans as the daily backbone. Meat appears rarely and in small portions, fish a few times a week, and processed food and added sugar barely at all. It looks far more like the traditional longevity diet than any modern eating plan. Buettner built this picture from interviews and observation. So treat the numbers as his summary averages, not measured intake from population surveys. The exact foods vary by region, but the diets share a common shape.

The base (~95% of the diet, per Buettner):

• Vegetables: Leafy greens, cruciferous vegetables, local seasonal produce
• Legumes: Beans, lentils, chickpeas. At least half a cup a day
• Whole grains: Barley, oats, corn, rice. Minimally processed
• Nuts: About two handfuls a day (almonds, walnuts, pistachios)
• Fruit: Whole fruit, not juice

In moderation:

• Fish: Small portions, 2 to 3 times a week
• Olive oil: The main cooking fat in the Mediterranean zones
• Wine: 1 to 2 glasses a day (optional)
• Dairy: Sheep or goat milk products in some regions

Rarely or never:

• Meat: Rarely, about 5 times a month, in small portions
• Processed foods: Rare to nonexistent
• Added sugar: Very little
• Soft drinks: Water and tea are the main drinks

The "Five Pillars" per Dan Buettner (paraphrase from his Blue Zones synthesis): Buettner consistently describes five pillars across the longevity diets he studied: beans, greens, whole grains, nuts, and tubers like sweet potatoes. This is his cross-regional synthesis, not a peer-reviewed claim, and the exact wording varies between his book and his talks.

Blue Zone people do not follow trendy diets or count calories. They eat traditional food their grandparents would recognise, in sensible portions, shared with other people.

You do not need to move to Sardinia to get the Blue Zone benefits. The key is to redesign your environment so the healthy choice becomes the default: build movement into your day, eat beans daily, protect time to unwind, and stay close to family and a regular social group. None of it depends on genes or geography. Here is how to apply the lessons where you actually live:

Set up your environment:

• Make movement hard to avoid: take stairs, walk to errands, garden
• Keep healthy food in plain sight and hide the junk food
• Create spaces where people actually gather

Purpose:

• Put into words why you get up in the morning
• Do things that matter beyond yourself
• Check in with yourself about what actually matters

Stress:

• Build daily rituals to unwind: meditation, a nap, a walk outside
• Defend time for rest and recovery
• Learn to say no to things that do not fit your priorities

Eating:

• Make plants the main event on your plate
• Eat beans daily in some form
• Use smaller plates. Eat slowly. Stop before you are stuffed
• Share meals with other people when you can

Connection:

• Protect time with family and close friends
• Join or start groups around healthy shared interests
• Consider a faith or spiritual community

The big takeaway: Blue Zone longevity does not come from any one trick. It comes from places and cultures where the healthy choice is the default choice. Set up your own life so the healthy choice is the easy choice. For more on the daily levers that move the needle, see our guide on how to slow aging.