Are all calories equal? Is breakfast a must? Are carbs the enemy? Wonder no more.

Our experts include: James O. Hill, PhD, cofounder of the National Weight Control Registry; Miriam Nelson, PhD, director of the Center for Physical Activity and Nutrition at Tufts University; David L. Katz, MD, head of the Yale University School of Medicine Prevention Research Center; Obesity Research; Institute of Medicine; and The Journal of the American Medical Association.

Question: Are all calories created equal? Do 50 calories of Godiva [chocolate] cause the same weight gain as 50 calories of grapefruit?

Answer: Yes, although the fruit calories might be more filling.