[f33d5173]

"health" as quantity of nutrients doesn't really make sense. pretty much everything we eat is good in some quantities, and bad in others. so there's no nutrient that you can name that makes food unhealthy (there are some like trans fats i guess, but mostly). then what makes some food "healthy" and other food "unhealthy"? there is actually a simple answer to this question: foods which lead you to overeat them are unhealthy, foods which don't aren't. so then the relation between ultra processing and health become obvious. processing is expensive. the reason companies do so much of it is to get people to eat more of their food. food that has been ultra processed is pretty much guaranteed to cause over eating and hence be unhealthy. food that has not been processed usually will only lead you to eat a healthy amount. so "ultraprocessed" is pretty much the same as "unhealthy". furthermore, as above, defining "unhealthy" directly is tricky, because it doesn't directly map to the nutrient content of food. so a good proxy metric, like "ultraproccessed", is useful.

[_aavaa_]

But your definition of processed foods has now shifted to being one of hyperpalitability and likelihood of overeating.

Those are two completely different categories. The first is, ostensibly, about the processing done to the ingredients to make the final product. The second is about the outcome that the product has on those consuming it.

If you remove the overconsumption angle, what is left of processed foods? And if processed is used as a proxy for overconsumption, why have this proxy at all, just talk about overconsumption (and the negative impacts of that) directly.

[f33d5173]

> But your definition of processed foods has now shifted to being one of hyperpalitability and likelihood of overeating.

that's a very small shift. the two are very closely linked

> why have this proxy at all

very simple reason: if i am in the supermarket i can tell immediately looking at a food how highly processed it is.

we have spent many decades telling people "just don't overeat" and it hasn't worked at all. we have also spent many decades telling people that "unhealthy" can be established by looking for a particular ingredient, say sugar, or fat, and it again hasn't helped.

the heart of the advice we would like to give people is that a healthy diet isn't one that has the exact right nutrient balance, but rather one that causes your body to naturally pick the amounts it needs. and we would like to communicate this advice in a way that makes it easy for people to make purchasing decisions.