I've heard from a friend that he takes creatine in monthly cycles and he often uses is to enhance his results from lifting and he says it helps him with XC mountain bike races. Does anyone know much about creatine like what it is exactly? If it's safe? If it will even help? I'm thinking about getting some but I know that the guy at the vitamin shop will only tell me about how great it is so I'm looking for some testimony or advice or whatever. Ant help?