When people on a high-protein diet eat a meal they choose themselves, their total calories go up — but they don’t feel any different in hunger or fullness.

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

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

Eating a meal you choose yourself makes you eat more that day and a little less the next day — but then you go back to normal.

People on a high-protein diet usually pick one meal a week to eat whatever they want — and when they do, they eat more that day but don’t feel any hungrier or fuller than usual.

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