I've not been hungry at all, during the 3 1/2 weeks i've been doing it. The trick is to eat something every 2 hrs. I have my shake at 9, fruit at 11, stirfry or salad at 1pm, shake at about 2:30-3pm, fruit at about 4 -4:30 and tea about 5:30-6pm. I drink loads too, loads more than 2l a day but as I only ever drink water it's not something i find difficult. x