> The longest living populations are eating diets that are heavy on plants yes, but not vegetarian or vegan.
The people longest living at the adventist church are pesco-vegetarians which are not vegetarians as far as I’m concerned. Also as far as I’m aware, there is no significant difference between the Adventist church goers in terms of life expectancy and the other blue zones, which are also consuming small to moderate amounts of meat, dairy, fish and alcohol.