Also known as: workout supplements for men, nitric oxide supplements for men, muscle building supplements for men, l-arginine 1000 mg, nitrous oxide supplements.*. Lab-Tested, Certified Organic GMP - Zeal Naturals uses only the highest-quality, thoroughly-tested ingredients in their products. All of the products are manufactured in a facility following GMP guidelines. The products are then 3rd party Lab-Tested to assure the quality of the ingredients. 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.*. 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.*. Maximum dose L Arginine - L-Arginine Tablets provide the highest dose of l arginine powder in capsule form with 3000mg of pure l-arginine in each serving and a 50 day supply.