Hello I was told to do an 2wk low calorie diet from my doctor my surgery date schdule for 6/10/14 I'm very nervous, I'm trying to get more advice from you guys on. Wats the best vitamins an protein shakes I haven't attended the nutrients class yet but I jus wanted to get a clearer looked on things but to answer ur question I haven't seen my doctor until 6/4/14 so maybe he will make me start as of dAt day