One thing I learned through occasional fasting is this: Most of us don't know what real hunger is. After 24 hours on just water the first time, I was ready to eat TOFU I felt so "hungry." Yet I knew, being at least 20 pounds above my ideal weight, I had plenty of fat reserves and could not truly be starving.
Imaging my surprise when, after making it 48 hours without food, my cravings disappeared! Those cravings were not true hunger, just the IDEA of eating things that taste good.
The feelings are still real, but sometimes it helps to know you aren't doing any damage to your body, that you won't lose energy. In fact, I've gone as long as 10 days on water only before REAL hunger kicked in. And fasting experts say the SECOND time you feel it, go ahead and start eating.
Anyway, I know fasting isn't for everyone, but just some perspective. Since June I've been fasting 24 hours out of every week, and that has helped me lose 22 pounds without any real exercise. But I'm also limiting calories during the week to 1000-1200 per day -- still feels like feasting compared with fasting