L—精氨酸 是以精制淀粉等糖质为主要原料，经微生物发酵、提取、精制而成。它是人体和动物半必需氨基酸，呈白色斜方晶体或白色晶体粉末状，对人体有很重要的生理功能，能提高人体的。L—精氨酸是一种重要的医药、食品原料。 L-Arginine (S)-2-Amino-5-guanidinopentanoic acid L-Arginine is a crystalline, free-form amino acid. It is an important factor in muscle metabolism and works to transport, store, and excrete nitrogen. It is a precursor for nitric oxide, which promotes increased circulation by relaxing blood vessels.