Protein is especially important following Lap-Band surgery. After Lap-Band surgery the stomach will never hold more than 4 to 6 ounces per meal, so making every bite count is essential for healthy and nutritionally rounded weight loss success.
Lap-Band patients are advised to consume fifty to sixty grams of protein daily to avoid protein deficiency. Protein deficiency causes hair loss, fatigue, edema, muscle weakness, and a delay in wound healing. A lack of adequate protein may also lead to depression, anxiety, irritability, apathy, and other mental health conditions, as well as cause a number of physical health issues from gallstones to colds, headaches, low blood pressure, anemia, irregular hear rates, and, in extreme cases, death.
Notice, I bolded delay in wound healing. This is the key factor following lap band. For you body to heal you must have protein. With out protien boosters and shakes you can't take in too much protein on liquids alone, that is why they encourage protein shakes post-op. Hope this helps.