There's always some food boogyman, but UPF is about as indistinct as you can get. Food-processing itself is quite unlikely to the problem, it'll be some common

There's always some food boogyman, but UPF is about as indistinct as you can get. Food-processing itself is quite unlikely to the problem, it'll be some common additive, or the general balance of fats (and fat types), proteins, carbs, micronutrients, etc. For my money, the big problem, after sugar, is vegetable oil.