maybe an advanced user has to take more because if u think about it, most novice and adanced users eating habits are the same, so they have to shoot more to see more results???

OR as the bigger you get, the harder your body aims to bring it self to its set weight?? so they may also fight that.

pluss 20 pounds on a 180 pound person is a lot, but not on someone thats 280, or atleast not as much. and they already have to just maintain there muscle as it is also.

just a thought!