Just to be devil's advocate here..
One could argue that juicing extends those limitations, allowing you to work that much harder, and that anything that allows you to reach your full potential is worth it.
Common pre-workouts include enough amphetamines to do just as much "cheating" of your natural ability to qualify against your moral outrage, to be perfectly honest. I have no cognitive dissonance in recognizing that the DMAA in my original Jack3d is giving me more endurance that I would have naturally.. hence why it is banned by any professional and most amateur sports organizations.
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