My surgeon recommends at least 2wk liquid diet preop: 4-6 HIGH protein shakes, 2 protein bars, and a banana (to keep up potassium levels) daily. (We use Bariatric Advantage products. They taste great!) The idea is to shrink the liver and the interstitial fat to make it easier and safer to maneuver around it during surgery. Good luck! Sent from my SM-G930T using BariatricPal mobile app