The factors we analyze in nutrition is calories, macro nutrient content, and micro nutrient content. In terms of obesity, what we really care about is satiation and satiety. These are words that no one talks about, and but get to the core of the issue. If I eat this food, how many calories will I consume before feeling full?(satiation). After eating this food, how long until I feel the need to eat again? (sateity).

Unfortunately the research and measurements of these values is thin. We need to fix that. We already know things like whole milk better provides satiation and sateity than skim milk, and children that drink whole milk actually have less obesity than skim milk drinkers.

If we just measured and labeled foods with a sateity/satiation index (what we really care about), then people would actually have a chance to pick better foods. Right now it is damn near impossible to determine if eating eggs and bacon for breakfast is more likely to drive over eating vs cereal. It can be measured, but we just don't do it.