I am on the 2 wks pre opt diet. Low Carp, No Sugar and High Protiens of no lower then 60 grams no higher then 80 grams... this was not easy.... Its 2 protien shakes and 1 meal.. My meal is 4oz chicken breast with .5 cup of green beans and slices of avocados and 2 shakes. I snack on apples or even some tomatoes. I drink the Lean Body ready to go...only one I found that I liked.I have my surgery on May 3rd. I'm a bit nervous cause I know am not even close to drinking all the water I should be.. am lucky to get one 20oz of water a day:( , so far I have lost 8lbs... Good Luck to everyone!!