But there's been some very good quality scientific studies (by Kevin Hall) that have compared food intakes over a period that have been the same in terms of calories and carb/protein/fat ratios and the only difference being naturally made vs UPF and there was a significant difference in weight gain/loss and health outcomes (blood pressure, cholesterol etc). This shit is literally killing us all.
But it's not necessary to cut out UPFs completely, if we can make it less than 20% of our food intake, it's good enough.
I want to read this book, but I recently listened to the podcast of a Guardian long read:
https://www.theguardian.com/news/audio/2023/may/17/from-the-archive-how-ultra-processed-food-took-over-your-shopping-basket-podcast
and I previously listened to the Thorough Examination podcast.
A couple of interesting points from the Guardian podcast were that Governments in some South American countries are obviously more enlightened and less under the influence of Big Food and are advising their citizens to eat fewer UPFs.
There's also a scientist in Brazil who's leading work into categorising food into 4 groups (Nova) and it's group 4, UPFs that we need to avoid.
Interestingly he has noticed a big reduction in the amount of sugar people in Brazil buy, but he's concluded that the people who are still buying sugar are the more healthy people, not because sugar itself has any goodness in it, but because it belongs to a person who cooks. Data suggested to him that the households who were still buying sugar were also the ones who were still making the old Brazilian dishes such as rice and beans so ate fewer UPFs.
This website also looks very useful
https://world.openfoodfacts.org/