This is probably BS, another example of "correlation is not causation". Vegans most likely live longer because they don't eat horribly unhealthy foods like ave

This is probably BS, another example of "correlation is not causation". Vegans most likely live longer because they don't eat horribly unhealthy foods like average people, and are much more conscious about eating healthy foods and having healthy lifestyle habits. They could do the exact same with meat, fish, dairy, etc. and probably get the same result. The simple fact is that most people have unhealthy eating and lifestyle habits. So if you isolate one group that does much better on these because of their focus on healthiness, then of course they're going to be healthier and live longer on average. It doesn't mean than their particular food choices are optimal or necessary. To counter your point, just look at Japan. It has the highest average life expectancy IIRC, yet vegetarianism there is pretty much non-existent, to the point where vegetarians (and especially vegans) who try to vacation there have a very difficult time. Meat and especially fish are huge parts of the diet.