I have a dear friend who did this 5yrs ago she was around 400lbs, she's 6" tall. I remember afterwards she was on a liquid diet at first & then when she could eat meals it was bites & she would complain about getting sick afterwards if she ate the wrong thing. She lost a ton of weight QUICKLY, sadly she put it back on after her 2 children. GB is very hard on the body. She has scars on her belly. She's going to start HCG when her infant is older.