Monster Mega Rare 553ML Black Cap Original UK import. Carbonated Energy Drink with Taurine, Ginseng, L-Carnitine, Caffeine and B Vitamins with Sugars and Sweetener. L-Carnitine + Taurine + Ginseng + B Vitamins This product is GMO free This product is gluten free This product is allergen free Tear into a can of Monster Energy, the meanest energy drink on the planet. It's the ideal combo of the right ingredients in the right proportion to get the job done like only Monster can. Carbonated Energy Drink with Caffeine Ginseng and B Vitamins Contains sugars and sweeteners Serve cold for maximum refreshment.