My first week post op was terrible! For some reason it all changed the second week. I felt much better. I was really struggling with getting all my protein so I decided to bulk up my protein shakes. My protein powder has 21 grams of protein, I used skim milk instead of water to give me 8 more grams, then added PB2 for an extra 5 grams of protein making my shake 34 grams of protein in 8 oz. if you can drink 2 of them a day, you hit your protein goal. It is easier for me to drink 16 oz of a protein shake all day than to force feed myself lower protein drinks all day. I hope this helps