Well, you don't say too much about your lifestyle or schedule. I would assume you are hungry because you haven't eaten for some time. But you don't say why. Actual hunger means you ought to eat something - a mini-meal, balanced with healthy grains and protein and fats, veggies and fruit maybe. Cravings or urges or appetite are different than hunger. The Spark Program clearly emphasizes not allowing yourself to get really hungry between meals - although when you first start out it is likely. If you need four mini-meals spread evenly through the day - whatever a day is for you - arrange to eat that way so you don't get hungry. A snack can help as well - an apple of a handful of raw veggies. Good luck!