As far as the energy argument is concerned, wouldn't starch be a better source, since it's all glucose? Sugar is not only an inferior source of energy (since it

As far as the energy argument is concerned, wouldn't starch be a better source, since it's all glucose? Sugar is not only an inferior source of energy (since it's only half glucose), the fructose wreaks havoc on your liver. As for the obesity argument, I think there are two things to consider here: 1. sweet foods are calorie dense. Hence, it's easy to consume too many calories until you feel full. 2. they also have a high reward factor, so it's likely that you would keep eating even after you're full - there's always room for dessert! Though, these problems not limited to sugar/hfcs. Fructose-free sweeteners suffer from them as well.