My pre op diet allows for sensible dinner, 6 oz healthy protein (chicken, lean beef/pork, fish) 1/2 cup carb (brown rice, potato, etc) and as many non-starchy veggies as I want throughout the day. Protein shake for breakfast and lunch..Feel fortunate, I guess...Have lost 10 pounds in 5 days..feel great! Glad I didn't have to go liquids only..that would be hard! Hang in there!