Red Bull Zero and Red Bull Sugarfree contain the same key ingredients as the original Red Bull Energy Drink – caffeine, taurine and some B-group vitamins. Both Red Bull Zero and Red Bull Sugarfree are made without sugars, instead using different sweeteners.
Because Red Bull Sugarfree has a different taste than Red Bull Zero. Those who want to enjoy the benefits of the original Red Bull Energy Drink without sugars have a choice of options.