I am currently 7 weeks pre-op. since about 13 weeks pre-op, I have been following a 800-1200 calorie per day plan of 60 G protein, less than 30 g sugars, and trying for 25 g of fiber. It has been tough but I lost about 17 pounds so far. I am frustrated with a current stall and, since the stall, have had days where I didn't track, (didnt binge but ate whatever I wanted to eat). I am not being too hard on myself because, even if the weight loss has slowed, I'm still eating healthy which should only help me during and after surgery. I have never been able to lose and keep it off, that's why I am having the surgery, right? But I did the pre-pre-op diet so that when I have to do it for real, it won't be so hard. Sorry for the long explanation. I hope this helped. Good luck!