Carbonated Energy Drink with Taurine, Ginseng, L-Carnitine, Caffeine and B Vitamins with Sweeteners. People have been blowin' up our inbox for years asking for a zero sugar Monster. We got it, but this ain't soda pop, dude!. Making a zero sugar drink that's good enough to earn the Monster M ain't that easy. Finally with a re-tooled energy blend, new sweetener system and after hundreds of failed flavours, we absolutely got it right!. Monster Zero Sugar with B vitamins and caffeine to motivate you to work (I mean play) harder, so generally you feel pretty damn good. Zero sugar, more Monster Magic . Unleash the Beast!