L-Arginine Nitric Oxide Tablet Amino Acids 3,150mg: BASIC GREENS Arginine supplement is the optimal combination to stimulate the production of Nitric oxide. Taken before exercise, it may boost performance by increasing oxygen, allowing you to exercise harder, for longer periods of time. It may affect the activity of white blood cells in the cardiovascular system and also help to remove waste through the bloodstream. This also means better flow to your muscles, with increased performance. Formulated in the USA. Non-GMO.