The "Blue Zones" have been debunked. Award winning researcher Dr Saul Newman looked into blue zones and found the secret to living over 100 is to live somewhere (the blue zones) that have poor record keeping, including birth and death certificates. People without a birth certificate have routinely claimed to be older than they are to get the pension in those places and some people have continued to collect their parents pensions after they died, so the records show they were still alive when they weren't. Those facts were not considered when the "blue zones" were made up.
Google "blue zones debunked". His research and award for it are all on the record.