I lost 23 lbs in my first week of my liquid only pre-op diet. I am now on day 11 and won't weigh in again until the day of my surgery on 8/24. Diet consisted of the required 3 shakes and 2 protein bars per day. Was allowed as much sugar free jello, crystal light, water, skim milk, and broth as I wanted. My results have been on the high end so far, but that is because I have so much to lose.