What is a Blue Zone?
A name given by researcher Dan Buettner and a National Geographic research team to regions of the world found to have an unusually high proportion of people living to 90 or 100 years old. The name "Blue Zone" comes from the researchers marking these regions with a blue circle on a map. The five originally identified regions are widely known, and they have been noted to share similar characteristics in diet, physical activity, and community culture.
Okinawa (Japan)
Known for the concept of ikigai (a "reason for living"), a traditional diet centered on vegetables and tofu, and a tight-knit neighborhood community culture called moai. It is notable for having many elderly residents who continue to lead active lives even in old age, such as tending a home garden or participating in local gatherings.
Barbagia Region, Sardinia (Italy)
Known for a naturally physically active lifestyle centered on mountain herding, a close-knit family-centered culture, and a diet that includes moderate amounts of a red wine called Cannonau. Because of the rugged terrain, walking and climbing are naturally woven into everyday life, and the region has been studied for its particularly high proportion of long-lived men.
Nicoya Peninsula (Costa Rica)
Known for a sense of life purpose called plan de vida ("life plan"), a traditional diet combining corn and beans, and strong extended-family bonds. Despite being an economically modest region, relatively low stress levels and strong community support are often cited as factors linked to longevity here.
Ikaria (Greece)
Known for a Mediterranean diet, a habit of taking afternoon naps, an unhurried, slow pace of life, and a tight-knit local community culture with frequent socializing among neighbors. It is often noted that the island's history of limited contact with the outside world helped its traditional way of life remain relatively well preserved.
Loma Linda (California, USA)
A region with a large population of Seventh-day Adventists, known for a largely vegetarian diet and a Sabbath culture of fully resting one day each week. Unlike the other four regions, it is located within a modern metropolitan area, making it a frequently cited example of how the lifestyle habits of a faith community itself can influence longevity.
Common traits observed across the Blue Zones
Researchers have identified factors such as natural physical activity, a plant-based diet with moderate portions, a sense of life purpose, family- and community-centered relationships, and healthy stress-relief routines as common threads. That said, the Blue Zones concept has become widely known through popular books and documentaries, and some scholars have raised questions about the accuracy of elderly population statistics in specific regions β such as errors in birth records or issues related to pension reporting. It is best treated as an interesting reference rather than an absolute answer.