L Citrulline vs L Arginine: Which Amino Acid Is More Effective? Zeelab Pharmacy Ditch arginine and go for L citrulline!, This common blood flow improving ingredient has better absorption, boosts nitric oxide more effectively, and is way gentler on your stomach. , If you take Nutricost L Arginine L Citrulline Complex Capsules 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