People can eat a lot more without feeling hungrier — meaning something other than hunger might be making them eat more.

How full or hungry people feel doesn’t explain why they eat more or less after choosing their own meal.

When people eat a meal with less protein than usual, they tend to eat more total calories that day — and this pattern holds up even when accounting for other factors.

What you eat in one meal matters more for how many calories you eat that day than how hungry or full you feel.

Eating less protein makes people eat more calories — but not because they feel hungrier. Something else is going on.

Eating a meal with less protein makes you eat more calories — but not because you’re hungrier. Something else about the meal is making you eat more.