For simplicities sake:
Meat (chicken, beef, etc) - Contains high levels of the protein casein linked to heart disease, cancer, etc.
Fish - Although high in Omega-3, more and more issues with mercury levels.
Cheese/Milk - The calcium found here, ironically degenerates bones. Let alone RSBT growth hormones and antibiotics flowing through.
Genetically Modified foods - Should be self explanatory.
Processed/sugary foods - Also self explanatory.
Vegetables/Plant Foods - Obviously better for many reasons, but again, for simplicities sake, I'll compare it to you hydroponics aficionados. If you raise a plant on NPK only, it will grow, but it will never be as rich as a plant raised on a combination of NPK and super nutrients. Same thing for humans. What garlic, broccolli, and a bell pepper can provide is so much more complex than a refined and reprocessed piece of empty calories.
I'm aware of all of these things, and many more. Does that mean that I never eat meat or cheese... no. I just minimize them, and when I can, try to choose the organic if I must consume them. Does it make me a better person... no. A dietary choice is not a religion on it's own. Does it mean that people haven't consistently told me otherwise... fuck yeah. Big Pharma, Big Food etc, has trained people well. I hear the buzz words... "you need meat, eggs, dairy or you will crumble up. As a man you need meat for testosterone. As a woman you need milk for calcium... blah blah blah".
It's simple, eat what makes you feel pure, not good for ten minutes and an insulin crash, not full and then incredibly sleepy, not jumpy and wirey and then dragged down, what really feels pure for the long term, and that's the diet that's right for you.
To add to that, I do take chlorella tablets and piracetam courses to regulate various other things (nootropics is a whole other conversation I know, but it is a factor), and somehow I feel pure.
If we ever get a private video library, I can definitely upload a few documentaries that go into far more detail.