Thanks for your entertaining and informative article! It inspired me to start IF. I don’t eat until 5pm each day. I go to bed early — usually by 9. I feel lighter and more energetic most of the day, but around 4pm I start getting a headache. Sometimes even my teeth ache! I’m only on day 6 of IF. Do you think this will go away once my body adjusts? I don’t usually get headaches, and I sure don’t like them.