Xtreme Energy Drink. Official Energy Drink UFC® - Ultimate Fighting Championship. Extra Punch of B12 Vitamins. Added Caffeine. Zero Sugar. The first energy drink developed by a nutrition company Xenergy was created for people who embrace a healthy lifestyle want mental and physician energy and are looking for vitality focus and endurance. No Sugar=No Crash in this clean sustainable energy drink formula with 100% natural colors and flavors. Xenergy is fortified with guarana taurine glucuronolactone and caffeine which promote memory mental awareness focus vitality endurance and increased energy levels. The herbal extracts and added minerals stimulate your body to produce its own energy.