The four pillars of every longevity diet in the world are whole grains, greens, nuts, and beans," Buettner said. "When you crunch the numbers, it's very clear that it's a 90% to 100% plant-based, very-high-carbohydrate diet. About 65% carbs, but not simple carbs like muffins and cakes - complex carbs."
Beans are a high-carbohydrate, high-fiber food that nearly impossible to eat on high-fat, low-carb diets like the trendy keto plan.
The favorite bean dish is a Greek "longevity stew," loaded with fennel, black-eyed peas, olive oil, tomato, and garlic.