optifast
I am also on Optifast - day 6 of 14 before Lapband surgery on Jan.19. I too have no energy and I'm freezing cold all the time (I was always too hot before!). Hunger isn't as bad as these other symptoms, but it is a struggle. I am eating diet jello or cucumber slices or drinking clear broth (very low calorie - e.g., 1 g carb, 1 g protien, 0g fat, about 15 cal) when the urge to eat more comes up. I have the most trouble when I'm sitting watching TV so I am trying to keep busy in other ways. Computer surfing, reading books, tidying the house...anything that uses fairly little energy but keeps my mind and hands busy.