being on the Pre-op diet depends on your BMI and the fattyness of your liver. There is a lady on one of the other sleeve weight forums that ignored the pre-op diet and her liver cracked and instead of 2 days in the hospital she was in 6 and instead of a 2 week recovery hers was over 6 weeks. If you have to cheat please make it a healthy cheat (sugar free Jello, vegetables, sugar free popsicles). That is what I was advised by my surgeon and nutritionist. Hang in there only a few more days to go and no more dying of hunger.