Despite the swiftly growing body of competitors, Red Bull has done precious little to provide more variety or keep up with the innovations that Monster and other companies have offered. However, Red Bull did add the Total Zero variety (despite already having a sugar-free version) after Monster rolled out its Absolute Zero, so it seems Red Bull has taken its head out of the sand. This variety of Red Bull has the exact same taste as the sugar-free version, meaning that it is pretty much the original flavor albeit a bit less sweet. A 12-oz can provides 114 mg of caffeine, making it roughly the equivalent of a cup of coffee. Thus, if you're used to downing multiple scoops of concentrated pre-workouts, then you won't feel much of an effect. I did find a noticeable increase in energy, although it wasn't a massive rush. What was more prominent was the uptick in focus, alertness and concentration. Thus, Red Bull Total Zero may be better suited to academic pursuits or perhaps strategic games than the weight room. There wasn't a big increase in body temperature or a prominent thermogenic effect, so if you get overheated using some pre-workouts, that shouldn't be an issue here. Not much in the way of athletic enhancing ingredients, just taurine, B vitamins, and caffeine essentially.