I can't prove anything medically or scientifically, but my thinking is this....I'm sure creatine benefits you whether on or off... I think you can see/feel the benefits more so when you're off than on, especially when you're trying to recover... you already have anabolic androgenic steroids giving you a huge boost while on, so I'm not sure how much more creatine can do for you at that point....plus, some AAS are responsible for increasing creatine synthesis dramatically (Anavar - oxandrolone - I think)... I would think that adding creatine would pale in comparison.