I tried protein shakes to get ready for surgery and thought I was set. After surgery 10 days ago I couldn't even keep sips of water down. I became dehydrated and had to go to hospital to get fluid (light headed, vomit, cold) My doc had me sip using a spoon and that helped. I found special K protein water. It is taste just like crystal light but with 5 grams of protein in it. I am up to 32 oz a day I need to get 64.