Western diet collapsed its fiber intake well over 80 years ago - it would have shown up already.
Well, you said "can't" and I asked "why", which feels very reasonable to me. Your argument seems to be that it wouldn't account properly for the data - specifically, you're saying we would have seen colon cancer rates rise earlier.
> Western diet collapsed its fiber intake well over 80 years ago - it would have shown up already.
I don't really buy this for a lot of reasons. Probably the two most important are (a) ability to screen historically and (b) the timing isn't particularly "off" for the fiber argument. We did see it already, we've been seeing increases in color cancer risks for decades.
Now, I'm not married to it "just" being fiber whatsoever, but if I were to "bet" on the major contributing factor, naively, that's where my money would go. I think it's very reasonable to not place your bet there.
I would also bet top reason is fiber but it isn't the only reason - multiple factors at play.
Very high.
> But if a person is regular and does not have any gut issues, how would more fiber help?
There is a ton of research about this and it's why WHO and other orgs state explicitly that fiber reduces rates of colon cancer.
Fiber does nothing.
1. Ancient egyptians ate fucktons of wheat and barley, lentils, chickpeas, etc. They ate massive amounts of fiber lol I mean holy fuck I just can't believe how wrong you are?
2. Fiber is very, very well understood by ALL health organizations to be preventative for colon cancer.
Homo genus is 2 million years old.
Repeating "muh authorities" isnt an argument.
Your willful axiomatic dogmatism isnt science.
Cave paintings dont depict agriculture. They depicted hunting and agrarian nomadic lifestyles