I feel like it's fine ... I've been on it for about a week now and I'm fine .. 2 eas shakes and one meal (protein/veggies) and 1 snack only ... 1 serving of fruit a cheese stick a hard boiled egg or plain Greek yogurt ... not sure what other pre-op diets consist of but minds doesn't seem to bother me at all. ☺️ good luck though nikkydizzle!