Hello my doctor told me to avoid caffeine And carbonated drinks that I was to drink two proteins shakes one for breakfast one for lunch and to eat 3 ounces of protein or the inside size of my palm and the outside fingers to be my vegetables and non-starchy vegetables add to drink 64 ounces of water and this was one week before my surgery I’m on liquids now and he just moved me to soft foods like A soft egg, Liquidy refried beans,Milk but it Has to be mootopia,almond milk. But not to drink too much milk as it is considered a carb and still has sugar.And my surgery was on September 7.