In my reading … People who lived the longest with fewest ailments ate a more austere diet, often centered around a starch (potatoes in Okinawa, rice in Asia, wheat and barley in Europe, corn in Africa), with fruits, vegetables, beans, nuts, and seeds to complement it. Their diets tended to be low in fat with very little animal food. They also remained active.

The longest-lived Ikarians tended to be poor people living in the island’s highlands.
– Ikaria, Greece, Blue Zones

A 98-year-old man and his wife on Greece’s Ikaria Island. Photograph by Gianluca Colla, National Geographic

98-year-old Stamatis Moraitis from Ikaria. The Greek Island Of Old Age, BBC