REDCON1 L-Citrulline Basic Training Series - 6. 35 Oz - Pumps The Objective: L-Citrulline Is The Natural Form Of The Amino Acid Citrulline. Citrulline S Vasodilation Through No (Nitric Oxide) Production, Helping To Improve Blood Flow And Muscle Pumps During A Workout. Supports Muscle Pumps Supports Nitric Oxide Levels Promotes Blood Flow | REDCON1 L-Citrulline Basic Training Series (60 Servings)