Truly, "eat less trash; eat more veggies; eat less total; and move around at least an hour a day" is such good advice for most of us in "the West" that following it somewhat well would provide 100x more benefit than the next-closest thing. Plastic additives? Gut microbes? Fructose versus sucrose? Balance of omega fatty acids? Specific exercise routines? Forget all that unless you're already eating really well and staying active daily, which very few of us are.
When I read articles about these kinds of things and start to get the urge to act on them, I try to remind myself that I should go do a few squats or walk around the block a couple times instead.
Aside from things like infectious diseases, we're not healthier than ever. We have better medicine than ever, but disease states that were once rarities have become commonplace in our modern world: https://en.wikipedia.org/wiki/Lifestyle_disease
By the way, these are diseases which cannot all be blamed on "being too fat and too sedentary", as even skinny people can develop type 2 diabetes. Unheard of centuries ago.
It's a choice for many, but I think it's not a fully informed one. If I'd known in my teens and early twenties what I know now, there is a zero percent chance I would have eaten and lived the way that I did. These things don't seem to hit people until the point that their personal health is affected, and sometimes not even then.
I think we're going to find the opposite in a few years.
A few years ago the fashionable thing was colonic irrigation (see https://journals.lww.com/ajg/fulltext/2009/11000/clinical_ef...). Now it just seems the pendulum has swung the other way and we need more crap in our colons, not less.
We're looking for reasons why we feel sick all the time but the reality is beyond basic things like being too fat and too sedentary, we are healthier than ever, and many many people had wretched miserable lives of chronic pain before modernity. The expectation of health is a modern conceit and this research is just a reflection of the constant anxiety that there is something wrong with us all - a cultural hypochondria.