https://gnusocial.jp/url/3172653 [theconversation com]

I remember in the 1970s, there were all the claims about extreme longevity in parts of the Soviet Union. I think Georgia and Armenia were among the areas mentioned. That was when yoghurt became popular in the United States. I don't claim there was an association, but yoghurt was reputed to be a key part of the diet in those long-lived areas.

Some time in the 1980s, I remember first encountering reports that records were missing, pension fraud was occurring, or even multiple generations and their siblings all shared the same name.

I said all this in order to state my agreement with this person's view. I haven't ever tried to research it in any way. But it is strange that most "blue zones" are places where documents are routinely missing, verification is difficult, and there is some reward (such as a pension from the government or tips from tourists) for being extremely old. And it seems that people in these areas are less healthy than their peers in other areas of the same countries, so long life is already a harder trip than in other places.