When I 1st starting fasting in the distant 80s, I used to get headaches, serious belly hunger pains, dizziness, low energy: the whole 9 yards... The hunger went away along w/ the headaches between 1.5-2 days. It's different for everyone. I was very lean & super athletic while in college, but also eating low fat, low protein vegetarian. I've much more body fat that I now carry around as I'm 47 & eat loads of fat & calories, and don't count the numbers. But I'm also more fat-adapted now.
So it's safe to say that the more you IF & stay in the low to med end of the PB zone, the hunger pain/feelings out to lessen or possibly even for some, go away. I have no way of estimating when the hunger signal will stop for you. Each time ought to be easier than the last, all things being equal.
Last edited by Betorq; 09-11-2012 at 10:05 AM.
"Science is not belief but the will to find out." ~ Anonymous
"Culture of the mind must be subservient to the heart." ~ Gandhi
"The flogging will continue until morale improves." ~ Unknown