R1 Pump Stim-Free Nitric Oxide Support Pre-Workout Protein Powder is formulated Pump with a capable combination of ingredients designed to help potentiate the physiological and psychological benefits of a great pump. Pump supports nitric oxide production to help enhance vascularity and size in hard-working muscles. Just add water, then exercise. Pump pre-workout features 16 active ingredients, including Nitrosigine, S7 and AstraGin, to help stimulate nitric oxide production within the body and support vascularity. May be used as a standalone for stim-free training or combined with high- intensity workout formulas for enhanced benefits. 16 Active ingredients. Transparent labeling. 3g l-Citrulline. 500mg Nitrosigine inositol-arginine sillicate. 50mg Clinically researched S7 Blend. 2g Taurine. Whole grape, pine bark, astragalus and panax extracts. A great standalone or drop-in for stim- free training. This unflavoured powder best taken about 15-20 minutes before exercise to set the stage for a powerful workout.