If you eat 100 calories and it takes the body 100 calories worth of energy to digest that, it's net-zero, and big dieting win. Some foods that get close to that mark and will help hit weight loss goals.
The hypochondriac in me is not looking forward to the return of that big buffet life. Thank goodness they still allow a buffet to-go box! Y'all ain't gonna stop me from enjoying my beloved buffet foods!