My guess is, assuming to genetic predisposition, colorectal cancer is far more tied to diet than plastic (which is likely non-region specific). Things like complex fiber, the right micro biome, etc.
"What makes the increase particularly mysterious is the fact that the overall incidence of colorectal cancer has dropped by 45% since the mid-1980s. While the cancer is still most frequently diagnosed in people over 55, the study found that patients younger than 55 were 58% more likely to be diagnosed with advanced disease."
If the cause were beef and milk consumption as such, it seems unlikely that a severe shift like this would occur. To me, it's far more likely to be something like crop dessication for grains--they started soaking cereal crops in glyphosate prior to harvest and suddenly this category of food that sustained the planet for millennia suddenly starts causing broad spectrum inflammation that people blame on the crop and not the processes and adjuncts.
I smell a Bayer, Nestlé, DuPont, J&J, Pfizer, Monsanto, etc-style hidden externality at work rather than animal husbandry. Like, what are the colorectal cancer rates for those people that actively practice transhumance? Do they differ significantly despite predominantly animal-product and dairy-based diets?
Many things have happened since the 80s; obesity as also shot up. In general people eat out more, eat fast food, and more simple carbohydrates. I think it would be hard to pin this one on any particular one thing. I
It’s also possible it isn’t one thing, but a confluence of factors.
