In a recent study, one group of overweight women ate a 200-calorie breakfast, a 500-calorie lunch and a 700-calorie dinner. Another group reversed it, eating a great, big breakfast and a smaller dinner. Three months later, the women who’d eaten the higher-calorie breakfasts had dropped an average of 19 pounds—11 pounds more than women in the other group—and had waists that were nearly 2 inches trimmer. The results show that it’s not just how many calories you eat in a day, but when you eat them that matters.

READ MORE: The Dinner-for-Breakfast Diet