About L-Arginine

L-arginine is classified as a conditionally essential amino acid. It is essential for infants due to their inability to synthesize L-arginine. L-arginine becomes conditional in adulthood.


L-arginine is the only naturally-occurring amino acid that produces nitric oxide. Nitric oxide is essential to the body for circulatory health. It helps with the elasticity of arterial walls and increases vasodilation, allowing for better blood flow. L-arginine is widely used by athletes to recover from fatigue. In addition, L-arginine participates in numerous other functions, including ammonia removal, cell division and wound healing. Please go to Ajinomoto Research to review clinical work on L-arginine.


L-arginine from Ajinomoto is manufactured by fermentation from carbohydrate sources under cGMP conditions. Ajinomoto does not use any raw materials of animal origin in the manufacturing process. A Drug Master File for L-arginine is on record at the FDA. L-arginine meets USP and EP standards.


Abbreviation: L-Arg
CAS Number: 74-79-3
Conforms To: USP, EP
Chemical Name: (2S)-2-Amino-5 -guanidinopentanoic Acid
Chemical Formula: C6H14N4O2
Molecular Weight: 174.2000
Nitrogen Content: 0.3216
Assay: 98.5 to 101.0%
Solubility: Freely soluble in water
Description: White crystals or crystalline powder

Action bulkAction small