The pre op diet... Dr. Goldstein said full liquid diet the day before surgery... But I watched so many youtube videos and they all say do the two week liquid diet cause it helps with the surgery and recovery. so I am on day 3 of liquid diet, and its not that bad. My wonderful husband who is not fat at all is doing the Protein shakes with me.... I know how you feel about second guessing yourself I think a lot of us do I know I did and I still do.