In overweight or obese teenage girls who skip breakfast, eating a meal with 35 grams of protein before lunch leads to less brain activity in regions linked to food motivation when shown food images,...

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.

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 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 for the missed calories.

For children aged 8 to 12, eating a breakfast high in protein instead of one high in carbohydrates leads to a measurable reduction in hunger and an increase in fullness within a few hours, regardless of their weight.