Among overweight or obese teenage girls who skip breakfast, eating a high-protein breakfast does not lead to a lower total calorie intake over the day, because they tend to eat more later to make up...

Among overweight or obese teenage girls who typically skip breakfast, eating a breakfast high in protein leads to about a 25% reduction in evening consumption of high-fat snacks, even when total daily calorie intake remains unchanged.

For overweight or obese teenage girls, eating breakfast—whether high-protein or normal-protein—lowers hunger and increases fullness during the day compared to skipping breakfast. A high-protein breakfast provides additional benefits in reducing hunger and increasing fullness during the afternoon.

Among overweight or obese adolescent girls who skip breakfast, eating a morning meal with 35 grams of protein from eggs and beef reduces hunger, increases fullness, alters hunger-related hormones, and reduces evening snacking on high-fat foods compared to skipping breakfast or eating a low-protein cereal breakfast, without changing total daily calorie intake.

Eating a high-protein breakfast might make people feel a bit fuller during the day, but the evidence isn't strong enough to be sure.

People who eat a high-protein breakfast might feel like they fell asleep faster and slept better, but the numbers aren't strong enough to say for sure.