No added sugar red bull is a good tasting energy drink. It is healthier than Monster energy because red bull does not have taurine, which replaces sugar. Sugar free red bull is mainly sodium. It has 210mg of sodium in it, even tho it does not have "sugar" in it. It has fake sugar. So obviously it is not healthy for you, but it is healthier than most energy drinks. Red bull has a tangy taste to it and to me it has kind of a after taste which does not taste that great. Red bull would not be my favorite energy drink. I rated this drink 4 stars because it is healthier than other energy drink companies, and it has a good taste to it which many people like. If you want a energy drink that gives you alot of energy, and it still being healthy for you, DRINK RED BULL!!!! It is way better then having stomach aches after drinking a can of monster or 5 hour energy.