I tend to not be hungry on the bike. In my first couple of years cycling, just a few years ago, I would frequently reach a point of exhaustion towards the end of longer rides. Now I add Hammer Perpetuum to water bottles with excellent results. In reading these types of threads I've concluded that every ones fueling need can vary considerably so it becomes important to find the best way to endurance performance on an individual basis. In general, most need to eat more of what ever is appetizing.