There is the NOVA system used to classify food where category 4 is ultra processed food: Monteiro, C., Cannon, G., Lawrence, M., Louzada, M. L., & Machado, P.

There is the NOVA system used to classify food where category 4 is ultra processed food: Monteiro, C., Cannon, G., Lawrence, M., Louzada, M. L., & Machado, P. (2019). FAO. Ultra- processed foods, diet quality, and health using the NOVA classification system. But to add to that.. ultra processing is not the issue in itself (well not if you use the definition as described in the NOVA system), the issue is certain steps or ingredients used in certain types of ultra processed foods. So blaming "ultra processing" is technically an over generalisation.