A lot of it is mediated through the effect of education, intelligence, or conscientiousness - all that have major genetic- environmental components
Or ESPECIALLY genetics on appetite control
Some of it also through how much people can tolerate vegetarianism or able to eat bitter foods.
But this is impt for determining the true genetic heritability of longevity (vs environmental heritability)
Simply having 3 SD or higher intelligence or the PC term “educational attainment”, seems to bring a lot of health benefits, including physical health. It’s common that these people are physically active, in good health, strength (which also has a neurological component), and quite nice and hospitable on average. I’m sure many have met these people.
It’s weird since the stereotype of the nerd is the complete opposite, or the smart person is stereotyped to be either anti-social or psychotic (when in reality the shizo genes have a negative correlation, and so on). That there are more people believing in astrology and such B.S. in colleges is just the college-educated becoming more and more like the normal population.
Vegetarianism can select for weird disgust effects toward food especially meat. But except the health benefits intelligence won’t matter as much with LLM’s I guess.
If you flipped all of the 10,000 gene bits for intelligence in the direction of intelligence, you’d probably also gain different savant like abilities for memory, calculation, etc, like Von Neumann, while at the same time probably having no schizo genes so unfortunately less potential to become a cult leader.