What's the Deal With Creatine?Brent Rose10/23/13 2:40pm15013EditPromoteGo to permalinkCreatine has been wildly popular since the 1990s. It's touted as a shortcut to gaining lean muscle mass, and packed into everything from supplement pills and powders to sports drinks. But how does it work, if at all? Is it even safe? Allow us to demystify this strange chemical beast.