I really want to see more fine grained research on UPF that splits it into categories. If you control for the carbohydrates and calories, eliminate anything tha

I really want to see more fine grained research on UPF that splits it into categories. If you control for the carbohydrates and calories, eliminate anything that's been fried at high temperature, and nitrate preserved meat, is it still unhealthy? What if you further control for BMI to eliminate the effect where people eat more processed food because the taste makes you keep eating? Some preservatives and artificial additives seem to have safety studies showing they're at least not 1987 margarine levels of bad. I don't see why a long list of ingredients would be a problem by itself,and some processed tech should in theory be able to reduce the calories with fillers and might even be beneficial. I could see grinding as being inherently problematic the same way juicing can be, but other than that, I'm pretty confused. Eery study seems to show ultraprocessed food is bad. But I still have no idea if uotraprocessing is inherently unhealthy, or it just so happens that 99% of ultraprocessed food is made of horrible things?