Not possible, unfortunately. Meat and vegetables are so totally different now. For example meats are raised on GM corn and antibiotics, altering their balance of omega 3's, impact on gut health, and other things. While today's vegetables are massively decremented in micronutrients- and may have less arsenic-based pesticide residue than your greatgrandparents', but more of other pesticides.
And if you can't because of where you live, there's a good chance neither could your grandparents had if they lived there as well.
Edit: For pregnant women and others for sure. But in the general population no
The advanced glycation end products from overcooked/burnt meat have been shown to, but not meat itself.
There's such a gap between Soylent and something like Wendell Berry's ideas:
https://www.ecoliteracy.org/article/wendell-berry-pleasures-...
People do mention that in relation to Soylent, encouragingly (whether it's altogether right or not). Historical perspective is very important.
My wife raises our livestock and garden while I work. Yesterday I had a sandwich and I know where every ingredient came from(our yard). Look, it's not impossible. It just requires you to look outside of your modern context.