[freehunter]

Even more than just a PSMF, what we went with was called the Velocity Diet. A PSMF can be chicken or beef or anything else with lots of protein, the Velocity Diet is 100% protein shakes. It was thought up by T-Nation, but you don't need to use their products specifically. The forums at bodybuilding.com have a lot of people who have done it and reported back on their findings. It's really hard to stick to and you will get sick of shakes real fast, but what it all boils down to is that this is a heavily calorie-restricted liquid diet. Normally you would lose some muscle mass doing that, but this diet is supposed to keep most of your new muscle as long as you keep lifting throughout.

I haven't done it in a very long time, and the thought of drinking even a single shake makes me feel ill now. But it's possible to lose 20lbs in one month.