L-Arginine Capsules 3000mg - Nitric Oxide Boosters - Improve Energy, Endurance, Performance, Build Muscle Mass Function: Build Muscle Mass Ingredients: L-Arginine Directions: Take two (2) capsules once daily Shipping: Ships within 48 hours on weekdays Shelf Life: 2 years Support for healthier circulation, stamina and energy. Not only is Arginine believed to support blood flow and muscle growth, but it is also a popular supplement for supporting energy production, stamina, and vascular function making it an ideal supplement for men and women of diverse activity levels. Used by many for bigger pumps and nitric oxide production. 3000mg of L Arginine provide a powerful precursor to Nitric Oxide production in the body which means more blood flow to the muscles. More blood flow can result in support for a bigger, stronger, and longer pump.