why do u think keanu reeves has to use anything? he's not ridicuously lean, nor is he big....all he has to do is before a film train for a few months, which actors usually have to do anyway, and follow any normal diet thats not to extreme...really its not that hard, some people are just more genetically gifted then others. i'm not saying that some hollywood stars dont juice, just saying i doubt keanu does, he hasnt made any real accomplishments, maybe 10-15 lbs of muscle, easily accomplishable in 4 yrs