Grahamsphillips
I have read some criticism of the blue zones but i thought some of the criticism was really overstated (for example the idea thta records in some societies was poor and parents could be mistaken for children - it cannot be seriously accepted that parents could be mistaken for children in okinawan society which was so highly interconnected and where even outside family, it was customary for okinawans to be part of non familial friendship groups of 5 on average that lasted their whole lives)…
On inuit, modern day inuit have poor health compared to other Canadians with life expectancy 10 years at least less than he national average. This is likely contributed to by modern life factors but even for inuit living 2000 years ago, i found this article that pointed out that their mumified remains ahowed evidence of high levels of arthrosclerosis - which indicates that reports of them being free of heart disease may be wide of the mark …
https://www.drmcdougall.com/misc/2015nl/apr/eskimos.htm
On the masai, I found an article that referenced an autopsy of 50 masai men which found extensive arthrosclerosis in their blood vessels corresponding to far older American men. Althoigh they did not die of heart attacks it was also found that they had abnormally large blood vessels which was probsbly why the gathering plaque had not completely occluded those vessels. The possible cause of such abnormally large vessels could be the fact that masai men walked 19km a day more than modern Americans would, which in fact caused them to be in caloric deficit and which caused almost all of them to be very slim and thin. As well it also turned out masai only ate meat 1-5 times a month nd that they got most of their calories from milk which doesn’t comfortably place them in the category of almost purely meat eating humans.
https://nutritionstudies.org/masai-and-inuit-high-protein-diets-a-closer-look/
Thus article in fsct also presented historical references that showed that the inui did commonly suffer from heart disease.
Furthermore the masai life expectancy is among the lowest in the world - 42 for men and 45 for women! Even if it is assumed that their high fat diet is not the cause, they could be dying of other causes before the gathering plaque finally causes the heart attacks that were impending…
Perhaps the true situation is more nuanced than our current understanding can tell us…