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Creatine can work for some people, i've never really had any "gains" from it but know people that swear by it. My advice? Give it a go, don't get a fancy brand just get plain monohydrate or cee. It's cheap, if you don't feel it's effect don't try it again- it won't do any harm.... You man put a couple lbs of water retention on though, so don't get worried if the scales go up!!
I'm sure I have read about some people having bowl issues from creatine, can't remember the name of it but it didn't sound nice!