Pre-operative diet for RNY

Hi guys

I am trying to figure out the preoperative diet before RNY? Is it mostly protein shakes and 600 to 700 cal per day? How much weight do most people lose  30 days before  surgery? If you could provide a link to a website with a good pre-op diet for RNY I would really appreciate it Thank You!😄 what if you have problems with the protein shakes?

There are quite a few different programs out there and each surgeon is a little different. For me, I started three weeks before surgery. For the first week, I was instructed to drink a shake for Breakfast and Lunch with a light dinner. I actually didn't hear the last part, and used that first week for food funerals . For the next two weeks, I was supposed to drink shakes three times a day with no solid foods. I could drink clear broths etc as well. 

For the shakes, they told me to drink ensure, glucerna, boost etc. I ended up drinking glucerna for the most part. Had I known then what I know now, I probably would have had something a little higher in protein such as muscle milk or something else. 

I lost about 26#. I know others have lost more, but the most important thing is to shrink your liver so the surgeon can access everything he needs to easily. I deemed my pre-op successful. 

The couple of week before surgery and after were the toughest for me. I was struggling with hunger at first, then that morphed into boredom. It gets WAY better. You just have to grit your teeth and get through the process.

Dittos to what ^^^^^^^^ he said in last paragraph.