When the foods you eat are lower in energy density, your body's natural appetite signals work in your favor," Dr. Kahleova said. "You eat until you're satisfied, and you simply end up with fewer calories. That's a sustainable way to manage weight.

This is something I've been thinking about recently. You could eat enough to be comfortable, but still control your weight at the same time. It's very interesting to find that someone has actually studied it as well.