Do you overeat because you don't feel satisfied or full? Volumetrics is based on "the science of satiety"--what researchers have learned about the food choices that make people feel full. The authors teach you how to eat low-calorie-dense, high-volume foods so that you feel like you've eaten plenty, even though you've eaten fewer calories. You'll lose weight without feeling hungry or deprived. Here's an example of how volume affects eating. Raisins are dried grapes. But 100 calories of raisins fill only one-quarter cup, while 100 calories of fresh, whole grapes fill one and two-thirds cups. You'll feel satisfied after one and two-thirds cups of grapes, but if you're eating raisins, you're likely to keep filling your mouth. The point is not to stop eating raisins (or chocolate, cheese, or other high-calorie, low-volume foods), but to realize that you're likely to take in many more calories before your body tells you you're full. If you're trying to manage your weight, eating more low-density foods (lower-calorie foods that have a lot of volume) will make you feel full while you drop pounds. Barbara Rolls, a respected and well-published food-nutrition researcher at Pennsylvania State University, and food writer Robert Barnett explain energy density and how to use this concept to lose weight. They include the scientific evidence about how low-density (low-calorie, high-volume) foods make you feel satisfied, the best (and worst) foods for a satisfying, lower-calorie