Citrulline vs. Arginine Which One's Better for Vasodilation? @moreplatesmoredates A lot of pre workouts still include Arginine under the assumption that since it's the direct precursor to nitric oxide, it must be Effect of L arginine or L citrulline supplementation on plasma amino Download Scientific Diagram Schematic presentation of the role of L citrulline L arginine cycle in Download Scientific Diagram Oral supplementation with a combination of l citrulline and l arginine rapidly increases plasma l arginine concentration and enhances NO bioavailability ScienceDirect L Arginine vs L Citrulline: Which Boosts Nitric Oxide More?