What’s in Speed Stack? Zero sugar, 5 calories, and one measly little carb. Oh, and then there’s 250 milligrams of caffeine, 760 milligram MethXanth Stack packed with DMAE, Guarana, Yerba Mate, Theobromine, Synephrine, Octopamine, and just about any other “ine” you’d want before your next training routine. This is one serious liquid power stack. WHAT YOU NEED * Explosive Energy * Heightened Alertness * Enhanced Thermogenesis * Minimal Carbs & Calories WHAT IT'S GOT * 760 mg Methxanth Stack * 250 mg of Caffeine * Theobromine, Yerba Mate, Guarana * 1 g of Carbs, 5 Calories