Okinawa is one of the world's 'Blue Zones', areas in which people live unusually long lives... or so we've heard. It's even been described as the 'land of the immortals'.
In this first episode of Blue Zones: Revisited, we ask just how unusual Okinawa's population really is, consider whether purple sweet potatoes might be the secret to a long life, and take seriously the advice of 99-year-old Fumi Chinen who says 'if anyone ever gives you something and tells you it's healthy, don't eat it.'
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