HPV is well defined. ;) As for HPF, it seems to be a euphemism for hyper-palatable food, i.e. food that increases time and calories consumed before meal cessat

HPV is well defined. ;) As for HPF, it seems to be a euphemism for hyper-palatable food, i.e. food that increases time and calories consumed before meal cessation. There's probably a threshold that captures 99% of the foods we are talking about while excluding 99% of the foods that are highly processed but not hyper-palatable. For example, unsweetened dark chocolate (70%+ cacao) would certainly be highly processed but not something highly palatable to most people. Same with Grape Nuts cereal or bran buds. Unsalted saltine crackers also come to mind. Palatability + calorie density seem like the best distinctions to focus on for this reason as processing is often used to increase palatability/density but not only used to increase them.