As seen in the New York Times and on Good Morning America-now updated by the author.

Imagine a diet that's as easy as "a spoonful of sugar" (or extra-light olive oil) twice a day. A diet that actually reduces appetite and cravings. A diet that's based on a wealth of scientific findings but is simple enough for anyone to stick to. A diet with results that amaze almost everyone who tries it.

Psychology professor Seth Roberts asks a simple question most weight-loss experts haven't thought to tackle: What makes people hungry? Based on a new understanding of how the human body regulates hunger, The Shangri-La Diet presents a strikingly simple and surprisingly effective way to lose weight-without giving up favorite foods.

Simple and counterintuitive, this extraordinary new diet is changing the way the world thinks about weight loss-one success story at a time.

Seth Roberts, Ph.D., is an associate professor of psychology at the University of California at Berkeley. He serves on the editorial board of the scientific journal Nutrition and has published dozens of scientific articles on many topics, including health, nutrition, and weight control.