Ultra processed people by Dr Chris van tulliken and for for life by Dr Tim Spector are good reading on this. The first is more focused on this issue.

was going to reference ultra-processed people. i walked away with some of the same general sentiments that are here -

1. nova classification is imperfect, but is better than what we had before it and i hope that we can iteratively find something more refined

2. so many nutrition studies are so woefully biased because of sponsorship (and antipathy) that it's laborious to extract meaning from them because much of the effort is tracing the money and potential bias.