I'd be cautious of Blue Zones, they're potentially not actually a real thing and more of a statistical construct.

https://www.science.org/content/article/do-blue-zones-suppos...

The lifestyle with olive oil and fish, or pension fraud? [1]

[1] https://www.theatlantic.com/podcasts/archive/2025/04/are-blu...

a familial history of shoddy record keeping?