Thank you everyone for responding. I just had my surgery 12/9/08. I have had a very hard time with keeping the whey/Soy protein in me. I started having diarrhea and belching on Thursday. It seemed like every time I drunk anything I had to run to the bathroom with in 45 minutes to one hour. It is very helpful to know others have had this same problem. After many days of this I took myself of the Whey protein, Slim Fast , etc. I am not having problems except for the belching and being very hungry. I am going to call the doctors office and see what they want to do about me getting enough protein though. Not to worry I have been talking with the after hours nurse about all of this.