Taurine + L-Carnitine + B Vitamins. Feel the power as you crank the cap off the meanest energy drink on the planet, Lo-Carb Monster Energy. Our jumbo can has a big mouth opening for a smooth pour and a cool resealable cap so you can save some for later. Low calories, no compromise. That's what Lo-Carb Monster Energy is all about. Get the big bad Monster buzz you know and love, but with a fraction of the calories and carbohydrates. Unleash the beast! www.monsterenergy.com. Facebook. Instagram. Twitter. YouTube. Monster Energy Blend: glucose, taurine, Panax ginseng extract, caffeine, l-carnitine, Glucuronolactone inositol, guarana extract, maltodextrin. Caffeine from All Sources: 70 mg per 3 fl oz serving (210 mg per can).