Reverse Engineering Longevity
By Dan Buettner
Life expectancy of an American born today averages 78.2 years. But this year, over 70,000 Americans have reached their 100th birthday. What are they doing that the average American isn’t?
To answer the question, we teamed up with National Geographic to find the world’s longest-lived people and study them. We knew most of the answers lied within their lifestyle and environment (The Danish Twin Study established that only about 20% of how long the average person lives is determined by genes). Then we worked with a team of demographers to find pockets of people around the world with the highest life expectancy, or with the highest proportions of people who reach age 100.
We found five places that met our criteria:
- Barbagia region of Sardinia – Mountainous highlands of inner Sardinia with the world’s highest concentration of male centenarians.
- Ikaria, Greece – Aegean Island with one of the world’s lowest rates of middle age mortality and the lowest rates of dementia.
- Nicoya Peninsula, Costa Rica – World’s lowest rates of middle age mortality, second highest concentration of male centenarians.
- Seventh Day Adventists – Highest concentration is around Loma Linda, California. They live 10 years longer than their North American counterparts.
- Okinawa, Japan – Females over 70 are the longest-lived population in the world.
We then assembled a team of medical researchers, anthropologists, demographers, and epidemiologists to search for evidence-based common denominators among all places. We found nine.
1. Move Naturally
The world’s longest-lived people don’t pump iron, run marathons or join gyms. Instead, they live in environments that constantly nudge them into moving without thinking about it. They grow gardens and don’t have mechanical conveniences for house and yard work.
The Okinawans call it “Ikigai” and the Nicoyans call it “plan de vida;” for both it translates to “why I wake up in the morning.” Knowing your sense of purpose is worth up to seven years of extra life expectancy
3. Down Shift
Even people in the Blue Zones experience stress. Stress leads to chronic inflammation, associated with every major age-related disease. What the world’s longest-lived people have that we don’t are routines to shed that stress. Okinawans take a few moments each day to remember their ancestors, Adventists pray, Ikarians take a nap and Sardinians do happy hour.
4. 80% Rule
“Hara hachi bu” – the Okinawan, 2500-year old Confucian mantra said before meals reminds them to stop eating when their stomachs are 80 percent full. The 20% gap between not being hungry and feeling full could be the difference between losing weight or gaining it. People in the blue zones eat their smallest meal in the late afternoon or early evening and then they don’t eat any more the rest of the day.
5. Plant Slant
Beans, including fava, black, soy and lentils, are the cornerstone of most centenarian diets. Meat—mostly pork—is eaten on average only five times per month. Serving sizes are 3-4 oz., about the size of a deck of cards.
6. Wine @ 5
People in all blue zones (except Adventists) drink alcohol moderately and regularly. Moderate drinkers outlive non-drinkers. The trick is to drink 1-2 glasses per day (preferably Sardinian Cannonau wine), with friends and/or with food. And no, you can’t save up all week and have 14 drinks on Saturday.
All but five of the 263 centenarians we interviewed belonged to some faith-based community. Denomination doesn’t seem to matter. Research shows that attending faith-based services four times per month will add 4-14 years of life expectancy.
8. Loved Ones First
Successful centenarians in the blue zones put their families first. This means keeping aging parents and grandparents nearby or in the home (It lowers disease and mortality rates of children in the home too.). They commit to a life partner (which can add up to 3 years of life expectancy) and invest in their children with time and love (They’ll be more likely to care for you when the time comes).
9. Right Tribe
The world’s longest lived people chose–or were born into–social circles that supported healthy behaviors, Okinawans created ”moais”–groups of five friends that committed to each other for life. Research from the Framingham Studies shows that smoking, obesity, happiness, and even loneliness are contagious. So the social networks of long-lived people have favorably shaped their health behaviors.
To make it to age 100, you have to have won the genetic lottery. But most of us have the capacity to make it well into our early 90’s and largely without chronic disease. As the Adventists demonstrate, the average person’s life expectancy could increase by 10-12 years by adopting a Blue Zones lifestyle.