L-Citrulline is a non-essential amino acid which when taken orally is converted to Arginine in the kidneys. Arginine, once in the blood vessels, releases Nitric Oxide. N.O. as it is known, dilates and expands the blood vessel walls, allowing for more blood flow, oxygenation and nutrient delivery when taken prior to training.
Titan Nutrition® L-Citrulline is an excellent training tool that can be taken by itself or stacked with your favorite pre-workout.