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Cardiovascular Health500 mg Per CapsulePharmaceutical GradeDietary SupplementAjiPure® Amino AcidPrecursor to Nitric Oxide for Vascular SupportSupports Healthy Plasma Arginine LevelsHigh-purity Pharmaceutical Grade SupportScience-Backed Quality Since 1969Swanson AjiPure L-Arginine is a precursor to nitric oxide with important roles in blood pressure maintenance and more. Produced through fermentation using raw ingredients of non-animal origin AjiPure amino acids are 99 to 100% pure. Impurities in other brands can be six times higher!AjiPure amino acids stand for purity efficacy and safety. Ajinomoto is the leading supplier of amino acids for medicinal use so you can be sure to trust the best.