There are a few different kinds out right now. They are supposed to fuel your body while you sleep, and they are pretty pricy. For me, price isnt a problem when it comes to puttin on muscle (even though i dont got a ton of money lol). What do you think of them? Heres links for two of them.
http://www.urbanbiologics.com/products/nightcharger/index.asp?sid=724807618
http://www.nutrasportonline.com/prod...?sid=724807656