Why You Feel Hungry?

Your stomach is more sensitive to the volume of the food you eat than to the number of calories the food contains," says Rolls, whose research shows that people tend to eat the same weight of food on average over a few days. So if you slash your daily calories -- say, from 2,500 to 1,500 -- by eating much smaller portions of your usual fare, you'll likely feel starved before your next meal, which puts you at risk of wolfing down too many snacks on the side. But if you add some low energy density foods to your low-calorie meal, says Rolls, it will look hearty and satisfying, you'll spend more time eating -- and enjoying -- the food, and the increased volume will prompt stomach receptors to signal to your brain that you're full. You'll feel more satisfied, which means you'll be less driven to sneak in more calories.