1. sodium nitrite/nitrate salts have been used in Europe at the very least from the 19th century to cure meat, the earliest regulations in (of course) Germany date back to 1916 [1].
2. MSG has been a part of traditional Japanese dishes, it naturally occurs in soy and fermented fish sauce.
So for these two substances, I'd say their presence in food doesn't make it "ultra processed" all on its own - they and their usage in cuisine date back to times when there was no food industry to speak of.
Are all of these ingredients equally harmful? If not, why not just ban or restrict the ones that are harmful and keep using the rest of them? It's sort of weird to bundle a lot of very different types of chemicals under the same term.
These novel ingredients keep getting banned for negative health issues like causing cancer, new variants keep getting introduced to the public, the new variants keep getting banned doe being harmful, repeat ad infinitum.
The public are not lab rats to be experimented on using these artificial ingredients so that companies can make money.
So things with scientific names are "ultra processed", and things with common names are not? That's just childish fear mongering.
Everything is a chemical. Salt is sodium chloride. Ingredients should be assessed individually and scientifically for their safety. Not just scary name equals unsafe. That's childish.
The war on monosodium glutamate is based racism and not science. It's as safe as table salt. There is no real science showing that it's anything but delicious.
Dextrose is just a simple sugar. It's essentially glucose chemically. Nothing to worry about. Your body produces glucose itself. You are not ultra processed because of that fact.
High fructose corn syrup is just fructose, another simple sugar [1], and there's no real science to back up all the fear mongering around it. It's no worse for you than any other sugar. All things in moderation.
Their idea is to point out curing agents, flavor enhancers and similar stuff you would not need if using fresh food made from high quality ingredients - basically if you see food with these ingredients, chances are high that corners were cut along the path for whatever reason.
And colorants/"food dyes" are even worse. A bunch of them are under strong suspicion of being carcinogenic, and often are used to mask the ingredients being cured for longer shelf lives or being of sub-par quality.
sure, it's all nature. and then wonder why you get 50% of the population morbidly obese...
you are being skeptical in a very silly way, sorry to say. if you don't see the industry incentives to use trash in your food instead of normal ingredients, you are missing the point in a very unproductive way.
The population is obese because they eat too many calories and they will not stop. Arbitrarily banning foods because they are not "normal" doesn't prevent this. Butter is OK, cream is OK, sugar is OK. When sugar takes a slightly different form it's "not normal" so banning it will make everyone thin again.
Is it any more evidence for ultra processing being the problem than the last N food panics? Obesity was high when the story was "high fat foods are the problem" too.
If you buy a fresh hamburger at the butcher, made by him with salt and pepper, it's processed food.
But if you add sodium nitrite/nitrate, monosodium glutamate, phosphates, high-fructose corn syrup, artificial flavors, sodium erythorbate, carrageenan, bha/bht, propyl gallate, tbhq, soy protein isolate, modified food starch, dextrose, caramel color, red 40, yellow 5, etc... it's ultra-processed food.