I know every surgeon is different but my 2 week pre op diet is as follows: protein shake for breakfast and lunch and for dinner 4-6 oz's of lean meat and non starchy veggies which are all veggies except( corn, peas, potatoes, and sweet potatoes). A light snack between meals if hunger persists and the following are acceptable 1 C light yogurt, 1 piece of fruit, non starchy veggies, 1/2 C low fat cottage cheese or 1-2 oz's low fat cheese or deli meat. I personally have just done the shakes and for dinner I've had 6 oz's lean meat, veggies and 1/2 C no fat cottage cheese, a TON of water like 70-90 oz's. I'm on day 5 and down 9lbs. Hope this helps!