Dan Buettner has uncovered the secrets to longevity. A Minnesota-based explorer and National Geographic fellow, Buettner is credited with discovering the five longest-lived places in the world: Ikaria, Greece; Loma Linda, Calif.; Sardinia, Italy; Okinawa, Japan; and Nicoya, Costa Rica.
Dubbed Blue Zones, these longevity hot spots have more centenarians than anywhere else. He talked with us about how Minnesotans can eat and live like these folks — and what Twin Cities neighborhoods you can move into to maximize your chances of hitting age 100 in good health. This interview has been edited for length and clarity.
What do people in the Blue Zones eat?
The Blue Zones diet is mostly plant-based and low-caloric density.
Does that mean you always have to be a little bit hungry in order to be healthy?
No, not at all. Take an Okinawan meal, for example, which will have celery, onion, garlic, daikon and tofu, and it is beautifully spiced. It has five times the volume of a hamburger, but it is nutrient dense and low in calories. It's like sitting down to a delicious compost pile, and when you're done you are completely full. You never feel hungry.
By the way, on plant-based diets you can get all the nutrients you need, including protein, consuming half the calories.
What about contemporary diet fads, like intermittent fasting?
If something is too complex for people to remember and if they have to have discipline for it, it won't work. People have discipline for a few weeks, but they aren't going to stay disciplined for years or decades.
The Blue Zones diet is sustainable because people know how to make the food delicious and, for the most part, it is cheap and easy to make. You put those three things together and you have the sustainability to [eat that way for the long run]. The reason people in Blue Zones are living to age 100 is because they are doing the right things, and avoiding the wrong things, not just for a few months while they are excited about it, but for years or decades.
What role do relationships and connectivity play in longevity?
The general rule is to have three to five really good friends who meet the three following criteria: One, you have to have regular contact with them. Two, you have to be able to have meaningful conversations with them. I'm not talking celebrities and sports. I'm talking emotional connection. And three, these have to be friends — and this is the litmus test — that are good enough that you can call them on a bad day and they will care. And then among those five, some should be vegetarian friends. If you don't have any vegetarian friends, you should make some.