On lab days, the participants were all given a standard 500-calorie lunch; for dinner they were given cut-up pieces of microwaveable pizza pockets and told to eat until they were full. They were then sent home with coolers packed with 4,000 calories worth of snacks: cookies, cakes, granola bars, candy (in its hard, chocolate, and gummy forms), chips, popcorn, crackers, pretzels, microwaveable mac and cheese, string cheese, fruits and veggies, single servings of ice cream, beef jerky, yogurt, and more microwaveable pizza pockets. This was meant to simulate the overexposure to and wide availability of snacks typical of the "modern food environment."

RESULTS: Eating any breakfast was associated with increased feelings of fullness, a reduced desire to eat, and lower levels of ghrelin (a hunger-stimulating hormone) throughout the morning. But meaty, eggy breakfast was associated with these benefits over the course of the entire day. Participants who had a lot of protein in the morning also had reductions in their "cravings-related" brain activity, and increased levels of a hormone associated with satiety. They snacked less on fatty foods in the evening, as compared to those who ate cereal or nothing.

Despite these positive chances, however, those who ate high-protein breakfasts ended up consuming about 120 extra calories overall. This was a nonsignificant difference, statistically, but one that wouldn't lead to them losing weight. The researchers believe that more benefits would be seen over time, as the participants adjusted to the early morning calories and because of their improved diet quality.

IMPLICATIONS: This makes a pretty good case for a high-protein breakfast. The authors propose ground pork loin as an alternative to sausage and eggs. If that doesn't do it for you, they also recommend plain Greek yogurt. To get 35 grams of protein you'd need to eat over two and a half servings of, say, Fage. For some, that's not a problem.

"Beneficial effects of a higher-protein breakfast on the appetitive, hormonal, and neural signals controlling energy intake regulation in overweight/obese, 'breakfast-skipping,' late-adolescent girls" is published in the American Journal of Clinical Nutrition.

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