Scientifically AdvancedCreatine-FreeHyperemia & Testosterone Enhancing PowderEnergy - Focus - Pump - StrengthPre-Workout Increased PerformanceDietary SupplementNaturally FlavoredWith Nitrosigine® - Bonded Arginine Silicate325 mg Caffeine3X StrengthClinically Tested BoronInsane PumpsSeething IntensityVasodilation - Testosterone - Reactive Hyperemia (Muscle Pumps) - StrengthFeel Your Power Surging within Minutes from 1 ScoopIncrease Free Testosterone by Up To 29% Nutraceutical Facts: Now with NITROSIGINE® for even greater pumps For nearly a decade, NITRAFLEX® has been the name you trust when it comes to pre-workout formulas. And now, NITRAFLEX ups the ante by introducing Nitrosigine to the mix, and adding even more pure Citrulline to the formula. This 1-2 punch greatly increases pumps beyond expectations. The volume has been turned up on the energy, focus and flavor as well. Lastly, there's no more artificial dyes in the formulas. All in all, this is the strongest and best-tasting NITRAFLEX yet Physiological Basis: "Reactive hyperemia" describes the increase in muscle blood flow that occurs during high-intensity resistance exercise and produces the "pump" associated with increases in muscle size. The NITRAFLEX pre-training formula contains ingredients that in animal, in vitro and clinical studies suggest possess properties that may help advanced athletes maximize energy, intensity, vascularity and reactive hyperemia (pumps) during their workouts, and provide long-term support of testosterone and Nitric Oxide levels in the healthy range when used as directed. Unique Properties of Some of the Key Compounds in NITRAFLEX : Powered by Nitrosigine: This new formula boasts Nitrosigine as its only source of Arginine. Nitrosigine has been shown to inhibit the enzyme responsible for breaking down Arginine, making it the superior choice of arginine supplementation and a perfect synergistic partner to L-Citrulline. Nitrosigine has scientifically validated that benefits last up to 6 hours after dosing. In addition to vasodilation (pump) and overall performance-enhancing benefits, Nitrosigine is clinically shown to increase mental focus, making it a truly well-rounded and multi-faced addition to any effective pre-workout formula.1-Scoop Serving: NITRAFLEX is so potent, only 1 scoop (1 serving) is necessary. Do not exceed 1 scoop in a single 24-hour period. Do not take NITRAFLEX within 5 hours of bedtime.200 mg of Boron Citrate in Every Dose of NITRAFLEX: This trace mineral has been shown to lower estrogen, while raising free testosterone by 28.3% in as little as 7 days Cognitive Enhancers: NITRAFLEX contains unique ratios of scientifically validated compounds that help you remain alert, intense and focused while you're flying from set to set with veins fully dilated and muscles pumped to the extreme.