How else do you plan on tracking 34000’s peoples diet for 12 years? Lock them in a lab?
Track local shop data what sales there to double check if people are not lying.
You you must track people until a statistically significant portion of them die.
That’s my point - they didn’t repeat the questionaire every x years. They didn’t check if self-reported habits changed. What they in fact measured is “if people in the ~30 have those habits, what is their life expectancy”. Heck, for all we know, at 40 they all became cat eaters or smthing.
Yeah and I never claimed it was only cuz of not eating meat.
That’s how I read your previous comment.
Why do you think natural selection optimizes humans for longevity? (living 85 years free of chronic disease). Evolution just optimizes for survival to reproductive age and successful child bearing.
That’s not what I meant. I meant that our digestive system is optimized for (some) meat intake - see e.g. iron and meat effect on iron absorption (from measly 1% non-heme iron to whooping ~15% non-heme iron absorption if meat is present in the dish).
Track local shop data what sales there to double check if people are not lying.
That’s my point - they didn’t repeat the questionaire every x years. They didn’t check if self-reported habits changed. What they in fact measured is “if people in the ~30 have those habits, what is their life expectancy”. Heck, for all we know, at 40 they all became cat eaters or smthing.
That’s how I read your previous comment.
That’s not what I meant. I meant that our digestive system is optimized for (some) meat intake - see e.g. iron and meat effect on iron absorption (from measly 1% non-heme iron to whooping ~15% non-heme iron absorption if meat is present in the dish).
We agree on that, sorry if that wasn’t clear.