ATOM BCAA 250g with L arginine, L Carnitine, L Citrulline AS IT IS Nutrition Citrulline vs Citrulline Malate: Which One Gives a Better Pump? 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 L Citrulline vs L Arginine Oral supplementation with a combination of l citrulline and l arginine rapidly increases plasma l arginine concentration and enhances NO bioavailability ScienceDirect