alt Hacker NewsIt's not meaningless.
"Processed" means that ingredients had to be manipulated to produce the food (e.g. most recipes). Most of what you make at home is "processed".
"Ultra-processed" means food produced using industrial processing, using additives (perhaps not typically considered "food" in an of themselves) for emulsifying, flavor, shelf stability & preservation, color, etc. That's a clear distinction.
Whether or not that means anything for the nutritional value and health outcomes from consumption of the food is a different question, but it can clearly be studied.
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The idea that you could buy any food that doesn’t fit that definition is silly, all foods have additives that’s why you can buy them and they last for more than 60 seconds on a shelf, all foods are processed because we don’t eat raw seeds as the majority of our staple diet. You have to come up with a definition of what “process” is good and bad, and what about them is “bad” before making statements like that.
That's not a clear distinction at all, since now you have to define "industrial". Why would mixing with an industrial blender lead to unhealthier food than a kitchen blender? Why would flour made with a gristmill be less healthy than a mortar and pestle? There's no theoretical basis.