This is an interesting situation that seems to apply to myself. When I began cycling about 7 years ago, I got hungry during a 2-3 hour ride. These days I do not get hungry on the bike even though temps are cooler here than N. Carolina. I'm wondering if once one becomes adapted to cycling if the body is burning more fat than usual, the hunger response is suppressed. For me, I am entirely satisfied for many hours, (actually for an all day ride) with Hammer Perpeteum in the water bottles.