Remarkably, we've learned that folks in all these places share similar rituals and practices surrounding food. (Hint: They don't count calories, take vitamins or weigh protein grams!) After analyzing more than 150 dietary studies conducted in Blue Zones over the past century, we came up with a global average of what centenarians really eat. Here are 10 age-old diet tips to borrow from the longest-living people on the planet.