my surgery is on tuesday feb. 24th. my surgeons pre-op diet has been 4 sugar free carnation instant breakfasts a day , the the sugar fee kind of course. im supposed to be doing this for 7 days. the only things allowed in addition our calorie free drinks and sugar free jello and popcicles. let me just tell you that it sucks! but i just keep remindfing myself that the end result is well worth what im doing now