I have the requirements for my two week preop diet. I guess I am lucky, I have the choice of two different plans, which I can pick and choose from. 3 Protein shakes a day, or oatmeal and half a cup of fruit for lunch, 1 Greek yogurt and half a cup of fruit for lunch, 3 oz protein and greens and half a potato for dinner. And to supplement if I get hungry I can have sugar free Jello, sugar free ice pops, or I can munch on veggies.