ok guys im 17 years old and i been lifting weights for about a year now...im about 145 5'7 or 5'8 and for my birthday i got some creatine monohydrate...but i dont kno if its safe for me to take it or not?...i have a lot of friends that take it and they arent complaining...can any of you guys tell me if its safe or not?...andy info would be useful, thanks