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. 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. With 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 black cherry lemonade flavour powder best taken about 15-20 minutes before exercise to set the stage for a powerful workout.