Our L-Arginine and L-Citrulline complex can aid in protein synthesis and muscle building. Power up your pumps with L-Arginine. This nitric oxide supplement may help build muscle for increased athletic and workout performance. Our formula supports the production of nitric oxide which can aid in recovery and endurance, and may improve blood flow throughout the body. This vegan and gluten free supplement contains 500mg each of L-Arginine and L-Citrulline. As a dietary supplement, take 2 capsules of L-Arginine + L-Citrulline daily, preferably with a meal or as recommended by a physician. EVL is a leading name in full stack bodybuilding supplements because we take our quality seriously and only use the finest lab tested performance maximizing ingredients.