Creatine monohydrate. In fact, I'm performing an experiment on myself and you can find the details of it on the thread entitled "creatine". And to give a brief update, my arm has increased 1 cm, which is roughly .4 inches, after 48 hours, so I think that I should be able to reach my goal of 3 to 4 cm within 2 weeks or so. Hey DK, how ya doing my man? GERMAN POWER BABY! but Im only talking bout da prodasant ones LOL