according to one of the most used classifications there are four levels of processing:
* unprocessed/minimally processed food, where the food is either in its natural state or the processing has not added anything to it
* processed culinary ingredients, where the foods are extracted directly from natural state
* processed foods, which are natural foods plus processed culinary foods,
and
* ultra processed food, which are industrial formulations made with minimal amounts of base natural foods.
Humans have always done some processing of food. The ultra processed food since the industrial revolution has been identified as very unhealthy. That doesn't make the other foods not unhealthy; even foods in their natural state can be unhealthy.
