[nl]

This, is true. But some foods make you feel less hungry for the same quantity consumed. I linked to studies[1] showing this, but judging from the downvotes it seems to be unexpectedly controversial.

The science is well established. It makes a lot of sense: people agree the glycemic index of food is important, and the satiety index builds on that look at the number of calories a food contains as well as how quickly it is absorbed.

[1] https://news.ycombinator.com/item?id=8502279

[iopq]

This is a little bit misleading because it's measuring up to 2 hours after the food was eaten, while some foods take longer than that to digest and to affect satiety. For example, an apple is very satisfying for two hours (high fiber and water content), but not so much after that. A food high in casein like yogurt (unsweetened) is actually going to satisfy you for up to 8 hours because of how long it takes to digest casein.

[nl]

Yeah, that's a fair point. But to me all that shows is that we need more measurements like the satiety index, as well as raw measurements like calorie count.