Vega sport sugar-free energizer helps you stay focused on the finish line. Helps relieve fatigue, promote endurance, and enhance cognitive performance. 100mg of caffeine sourced from green tea. All the caffeine, none of the carbohydrates. Sugar-Free Energizer has only 10 calories per serving and no artificial flavors or sweeteners. Rhodiola and caffeine help keep you alert and on-the-move.