Pretty much anything that isn’t in the meat, produce and milk areas. If it’s premade from a big corp, it’s bad for you.

Edit: Also, this…

A small but landmark randomized controlled study in 2019, led by the National Institutes of Health’s nutrition expert, Kevin Hall, found that when inpatient trial participants received diets with ultra-processed foods, they ate roughly 500 extra calories a day compared to a control group of inpatient participants who were served a diet that was matched in macronutrients but did not include ultra-processed foods.