The researchers questioned these details, too. Any place labeled a blue zone has to have excellent records they could trace. One of the blue zones is in California. It’s worth looking at their process
7th Day Adventists have food and lifestyle differences from the surrounding population. They are the ones living longer. There have been a bunch of ongoing long term studies on them.
One of the findings is that diet matters. They’ve looked at diet differences and certain characteristics show up for people who live longer and have more good years. Those same things show up in the other blue zones.
I guess as time progresses, centenarians will come from cohorts with records that can be better trusted. This will confirm or invalidate the blue zone findings.
