Beyond Raw® Chemistry Labs™ L-Arginine: Lab Grade Arginine Is An Essential Precursor Of Nitric Oxide, Which Helps Maintain Blood Vessel Tone And Plays A Role In Protein Synthesis. Involved In Creatine Formation, It Can Have An Influence On The Cardiovascular System Through Nitric Oxide Production (Which Helps Maintain Blood Vessel Tone) And Helps Fuel Muscle Cells. Lab Grade 3 Grams Per Serving Gluten Free | Beyond Raw Chemistry Labs L-Arginine (30 Servings)