It's pretty simple: In phase one, restrict eating to lean meats, eggs, lots of non-starchy veg (so no potatoes, carrots, corn), reduced-fat cheese, and a limited amount of nuts per day. Olive oil is okay if you don't go crazy with it. No bread, rice, or sugars at all. No dairy other than the above, and maybe a splash of milk in your coffee or tea. (They say, decaf only. I say, bite me.)

You're supposed to do this for at least two weeks (longer if you can stand it).