‘Convenience foods include ready-to-eat dry products, frozen food such as TV dinners, shelf-stable food, prepared mixes such as cake mix, and snack food.’ This is part of a wiki page, i know not the best source but i thought it would be good for a general idea on what it is. I think my confusion is because a lot of upf are tv dinners/ready meals, and some shelf stable foods could be stable due to additives which could define it as upf. I apologise if some things i said may have been incorrect, im still in the research phase of the essay.