L-Arginine Supplement Boost Endurance -Increase for Energy, Strength,Vascular and Endurance Support During Exercise | Muscle Mas 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. Many use it to boost pumping and nitric oxide production. 3000 mg of L-Arginine provides a powerful precursor for nitric oxide production in the body, which means more blood flow to the muscles. More blood flow supports a bigger, stronger, longer-lasting pump.