Hi Kristin, I started trying protein drinks before surgery, I figured I wouldn't feel like trying a bunch of different drinks after. Do remember though that some peoples taste change after surgery. For me personally, the carnation instant breakfast did not have enough protein. I use the isopure powder, you can mix it with milk or water. Each scoop has 25 grams of protein in it. I am now mixing mine with water to avoid the extra carbs, and 1/2 TBS sugar free chocolate syrup made by sweet and low. I stir it up with a spoon and add ice, as I don't care for thick, shake like type drinks. Best wishes to you for an uneventful surgery and quick recovery. Take care!