The thought of them sewing me back up and sending me home because my liver was too big, was enough to scare me into knowing from day 1 that I would not cheat even a little bit! Even if the risk is small, I was not about to take that risk. I would say for me, the 4th day was the hardest! I've practiced doing it for 3 days off and on to get a feel for what it would be like, so when I actually started it and that 4th day hit...I went a little crazy! Then it got better, and now it just feels normal. I'm on day 18 of a three week liquid diet, and I'm definately tired of it...but it feels normal, if that makes any sense!