[hammyhavoc]

I find it amazing how much experiences vary. I think a large part of it may be what you eat when you do eat, and also the quantity. Portion sizes seem to vary drastically.

If I fast, I generally get moody and all I can focus on is food. A lot of friends fast for religious reasons too, and the overwhelming majority of them get cranky instead of more productive and able to focus.

[dcchambers]

I think the key is simply letting your body get used to fasting. If you only do it occasionally but usually eat at all the socially "normal" times then of course you're going to be cranky and hungry when you decide to suddenly deprive your body of what it is accustomed to. Eventually, with consistent intermittent fasting, that will change.

[shubb]

I find that if you eat or drink anything with calories between waking up and breaking your fast your body switches mode and wants food. Even a black coffee is risky. Maybe something about ketosis.