In short, yes.
Make sure though, that you don't just spiral into eating less and less and less. Fasting and eating high fat/primal will help satiety and tune you into when you are actually hungry, but you don't want to just never eat either. I know I'm going extreme with that example, but I like to warn new fasters. It kind of happened to me. Now I make sure I eat big when I'm hungry, and still fast about 14-16 hours daily.