L-Arginine - Nitric Oxide Supplements - Boost Endurance & Strength, Promote Muscle Growth, Improve Performance Function: Supports muscle health Ingredients: L-Arginine HCI Directions: Take two (2) capsules once daily Shipping: Ships within 48 hours on weekdays Shelf Life: 2 years Premium L-Arginine - Our premium L-Arginine combines Arginine and Arginine Alpha-Ketoglutarate with Citrulline, a precursor to Nitric Oxide (NO) production. We combine the two best forms of Nitric Oxide with Citrulline to create three synergistic effects, ensuring you get the full benefits of Arginine!