It's not all about the caffeine whether youre hitting a late-night gym session or just looking for a little extra kick in your workout PUMP has been designed to help you maximize your workout session. Little do most know, but caffeine and most stimulants make it harder for oxygen and blood to get into the muscle. Thats where PUMP comes into play, with specifically designed ingredients to help increase oxygen levels and blood flow to the muscles to help increase endurance, vascularity, and recovery all in one. Greater Skin Splitting Pumps with Nitrosigine - Nitrosigine is a patented arginine/silicate complex with powerful benefits for circulatory health. Arginine is a precursor to nitric oxide, the miracle molecule that expands blood vessels to optimize blood flow. Silicon is concentrated within the arteries, where it helps maintain their structural integrity. Nitrosigine provides the benefits of both, along with additional benefits from the unique synergistic combination. Preclinical data clearly demonstrates the superiority of Nitrosigine over standard arginine, with nearly twice the improvement in blood flow in a head-to-head comparison of Bradykinin-induced vasodilation responsefour times greater than the control. PUMP can be taken by itself or stacked onto one of our phenomenal pre-workout formulas to take your workout to the next level.