Blue zones, supposed havens of longevity, have become a global brand. But skeptics think they rest on shaky science

“Critics say blue zones are based on suspect data and flawed methods, and point out that the published scientific literature on blue zones is relatively small compared with the attention the concept receives.”

https://www.science.org/content/article/do-blue-zones-supposed-havens-longevity-rest-shaky-science