What Are Blue Zones, The Areas Where People Live Beyond 100 Years Thanks to Food (and More)

What do Sardinia, Ikaria, Okinawa, Nicoya, and Loma Linda have in common? They are all places scattered around the world whose inhabitants have the potential to live to be a hundred or more years old. A study has classified them as Blue Zones, and they differ from any other place in terms of their better and longer life expectancy. Numerous scientists have studied the secrets and lifestyles of the people who live in the Blue Zones, and in this article, we'll explain them one by one.

What Are Blue Zones, And Where Are They Located?

Over the past decade, Blue Zones have been the subject of numerous studies. For years, researchers have sought to understand the factors that lead the people who live there to live so long, and whether we, too, could adapt these lifestyles to our own. The first person to coin the term "Blue Zones" was Dan Buettner, an American journalist who, in collaboration with National Geographic, worked to identify these particular areas of the world. The reporter traveled extensively and identified the five areas recognized as "Blue Zones" around the world.

• Sardinia (Italy): more specifically in the Barbagia region which consists of the Gennargentu and Ogliastra areas where a high concentration of male centenarians is recorded.
• Okinawa (Japan): The southernmost island of the Japanese archipelago is renowned for its healthy diet and strong sense of community. Here, women over 70 are the longest-lived in the world.
• Nicoya (Costa Rica): This place is known for its healthy and active population who also enjoy a much higher life expectancy than the rest of the country.
• Ikaria (Greece): a small island in the Aegean Sea where people live on average ten years longer than their peers in other parts of the world.
• Loma Linda (California, USA): Compared to the average for the entire United States of America, life expectancy here is much higher thanks to a vegetarian diet and a healthy, regular lifestyle.

What Increases Life Expectancy in Blue Zones?

It took years of research to understand what these zones had in common and what the predominant factors were that increased life expectancy. These components are not limited to individual factors of longevity and health but, rather, are the result of a complex, integrated, and refined lifestyle. In his treatise "Reverse Engineering of Longevity," Dan Buettner explores the secret of human longevity, not through genetics but through the behaviors of people considered long-lived. After a careful multidisciplinary analysis, experts have identified nine common factors among Blue Zone residents, all with a strong link between dietary habits and lifestyle.

• Natural movement. Rather than relying on mechanical aids, physical activity is a panacea for longevity. Therefore, it's important to include daily activities such as walking, dancing, gardening, and housework, which promote regular movement.
• Purpose. In Japan they call it "ikigai," in Latin America "plan de vida": having a motivation to get up in the morning.
• Downshifting. Literally meaning "shifting down a gear," Dan Buettner and his team of experts mean that practicing downshifting means learning to manage stress and slowing down the pace of life. These practices bring numerous benefits, including reducing the risk of cardiovascular disease and other stress-related health problems.
• The 80% Rule. A Confucian mantra, Hara hachi bu, passed down for over 2,500 years among the Okinawans, dictates that, after meals, one should leave the table feeling 80% full, avoiding overeating. People in the Blue Zones eat their smallest meal in the late afternoon or early evening and then abstain from eating for the rest of the day.
• Plant-based diet. Steadily increase your intake of fruits, vegetables, grains, and legumes, and reduce dairy and meat-based meals.
• Moderate alcohol consumption. Drink alcohol in moderation, if at all.
• Religious community. Nearly all Blue Zone residents interviewed said they belong to several faith-based communities. Research shows that attending religious services at least four times a month increases life expectancy by four to fourteen years.
• Family comes first. Caring for your family, from parents to children to your partner, improves your life expectancy.
• Social circle. Being part of a strong social community, living in close connection with friends, family, and neighbors, creates a sense of belonging that promotes psychological well-being.

Recent studies conducted by Harvard University have shown that the importance of social connections is beneficial for longevity. Blue Zone residents cultivate deep bonds and actively integrate older adults into society. This type of engagement is crucial for reducing the risk of neurodegenerative diseases. Isolation and loneliness can accelerate the physical and cognitive aging process.

Decades of Studies and Research

Dan Buettner's project conducted field research and found that centenarians in the Blue Zones not only lived longer, but were also less likely to develop diseases like diabetes or Alzheimer's.

A major study on Okinawa conducted by the NIA (National Institute on Aging) followed the island's residents for over thirty years, revealing a low incidence of cardiovascular disease among older adults. Research has shown that their diet, based on vegetables, tofu, and low-fat fish, may be responsible for their long-term health.

Studies on Loma Linda and Sardinia

A study conducted in Sardinia by the University of Sassari and the Scuola Superiore di Sant'Anna in Pisa highlighted how Sardinians' longevity is a combination of their lifestyle, which includes a varied diet and low red wine consumption, and a reduced incidence of cardiovascular disease.

Moving on to California, in Loma Linda, the town's Seventh-day Adventists are the subject of research by Loma Linda University, which has discovered that this population has the highest life expectancy of any other population in the country. Furthermore, their risk of cardiovascular disease is significantly lower here, compared to the US average. This is because their lifestyle includes a vegetarian diet, abstention from smoking, and a strong community of support.

In conclusion, the discoveries made in the Blue Zones offer important lessons that can be applied to significantly improve our lifestyles. Among these, the importance of a balanced diet comes first, followed by regular daily physical activity, nurturing social relationships, and systematic stress management. Essentially, the Blue Zones teach us that the key to long life lies not in a single behavior, but in a complex balance of habits that gradually foster psychological, physical, and social well-being.