Health Center - Obesity

About one-third of American women 20 years of age and older are considered obese, according to the Centers for Disease Control and Prevention. Obesity is caused by multiple factors, both environmental and inherited. Learn more about this complex disorder, including risk factors and key strategies for weight loss.
Obesity Guide

Eat More, Weigh Less

brussel sproutsDo you always feel as if you should lose a few pounds? Many of us think of ourselves as being overweight—even fat—when we're not close to that mark. Yet we watch the numbers on the scale and worry if our weight registers a pound or two (or kilogram) above what we've decided the right number ought to be.

That's because depriving ourselves of food seems an inevitable part of losing weight. When we look at our dinner plate while dieting, we often see more plate than dinner.

No wonder losing weight feels like a battle against ourselves. We're fighting our natural biological and psychological needs to have our appetites satisfied. Yet it's possible to eat ample meals, feel full, control hunger, have a nutritious diet and still lose weight or maintain weight loss.

Less is more

Scientists who study the body's feeling of fullness, called satiety, have shown that foods with high concentrations of calories in each portion increase our body weight and the overall amount of food we eat. The high energy density of foods such as fried onion rings or homemade chocolate chip cookies makes them taste appealing, but they don't create feelings of fullness until you've overeaten.

By contrast, foods with low energy density (vegetables and fruits, nonfat milk, cooked grains, soups, stews, lean protein), have fewer calories, but make us feel more full. They also promote weight loss.

Since most of us eat about the same weight of food every day, it makes a difference whether that food has a high or low energy density. If you combine big portions with high energy density—such as happens in many fast-food selections—you're cramming your daily food intake with too many calories.

Why water works

The key to keeping energy density low is water—not the stuff you drink from those cute little bottles, but the water content of foods. According to researcher Barbara J. Rolls, Ph.D., professor of nutritional sciences at The Pennsylvania State University in University Park, PA, and author of The Volumetrics Eating Plan (Harper Collins, 2005) and The Volumetrics Weight-Control Plan (Quill, 2000, HarperTorch, 2003) foods with low energy density are loaded with water. When you eat them, you can increase the volume of food you consume for the same, or fewer, calories.