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 pre workout, check 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 Citrulline Malate vs L Arginine: Boost Pumps & Performance Liquid L Citrulline L Arginine Taurine Supplement for Energy Ripped Up Nutrition Oral supplementation with a combination of l citrulline and l arginine rapidly increases plasma l arginine concentration and enhances NO bioavailability ScienceDirect Dietary Arginine and Citrulline Supplements for Cardiovascular Health and Athletic Performance: A Narrative Review