I take a Redline when I get to the Gym - everything seems pretty tame to me compared to the stuff I used to drink - Ultimate Orange - had a boxing glove on the canister - scary shit.
I drink them to get a buzz I guess. My be habit. I drink a sugar free Red Bull every AM on the way to work, and I certainly don;t "feel" it, so again I think it may be habit.
Juiced Rockstar, yea thats what its called, it has milk thistle, ginko and all sorts of b-vitamins, but the main thing its almost all real juice with no high fructose corn syrup. Only certain places sell them