L-Arginine - Supports Muscle Growth, Promotes Blood Circulation, and Enhances Immunity, Improves Endurance and Performance Function: Supports muscle growth and blood circulation Ingredients: L-Arginine Directions: Take two (2) capsules once daily Shipping: Ships within 48 hours on weekdays Shelf life: 2 years Max Dose L-Arginine - Contains 3000 mg of pure L-Arginine. Supports healthier circulation, endurance, and energy. Not only is arginine known to boost blood flow and muscle growth, it is also a popular supplement for supporting energy production, endurance, and vascular function, making it an ideal supplement for men and women of varying activity levels.