Intermittent fasting is simply eating within certain windows of time. It is NOT starving yourself like some people think. At one point I was doing an 18 hour fast with the 6 hour eating period. With the way my schedule was at the time, I would start my first meal around 11am and stop around 6pm or so (depended on the day). Like most people, I hated going to sleep hungry so I pushed my window further into the day because I could tolerate being hungry in the morning but I could not tolerate it while trying to sleep. Like some other people have already stated, your body WILL adjust and every day it becomes easier and easier.