Supports exercise endurance and intensity Suitable for everyday fitness enthusiasts and hardcore athletes alike 3,000mg of l-arginine alpha-ketoglutarate per serving Made in the USA using ingredients that are both foreign and domestic Arginine alpha-ketoglutarate, or AKG, is used to support nitric oxide production. Nitric oxide promotes vasodilation to increase blood and oxygen circulation throughout the body, allowing you to work out harder for longer periods of time. If your sights are set on achieving a photo-worthy pump, consider adding The Vitamin Shoppe brand Arginine AKG tablets to your supplement stack.